{"id":12617,"date":"2025-09-19T10:38:21","date_gmt":"2025-09-19T09:38:21","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12617"},"modified":"2025-10-21T07:58:04","modified_gmt":"2025-10-21T06:58:04","slug":"time-and-distance-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/19\/time-and-distance-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Time and distance Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">1. If a car covers 120 km in 2 hours, its speed is:<br><\/mark><\/strong>A) 50 km\/h<br>B) 60 km\/h<br>C) 70 km\/h<br>D) 80 km\/h<br><strong>Answer:<\/strong> B) 60 km\/h<br><strong>Explanation:<\/strong> Speed = Distance \u00f7 Time = 120 \u00f7 2 = 60 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">2. A person walks 10 km in 2 hours. His speed is:<br><\/mark><\/strong>A) 4 km\/h<br>B) 5 km\/h<br>C) 6 km\/h<br>D) 8 km\/h<br><strong>Answer:<\/strong> B) 5 km\/h<br><strong>Explanation:<\/strong> Speed = 10 \u00f7 2 = 5 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">3. If speed = 72 km\/h, then speed in m\/s is:<br><\/mark><\/strong>A) 15 m\/s<br>B) 18 m\/s<br>C) 20 m\/s<br>D) 25 m\/s<br><strong>Answer:<\/strong> B) 20 m\/s<br><strong>Explanation:<\/strong> Convert using 1 km\/h = 5\/18 m\/s.<br>72 \u00d7 (5\/18) = 20 m\/s.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">4. A train covers 180 km in 3 hours. Its average speed is:<br><\/mark><\/strong>A) 50 km\/h<br>B) 55 km\/h<br>C) 60 km\/h<br>D) 65 km\/h<br><strong>Answer:<\/strong> C) 60 km\/h<br><strong>Explanation:<\/strong> Speed = 180 \u00f7 3 = 60 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">5. A bike travels at 40 km\/h. In 3.5 hours, it covers:<br><\/mark><\/strong>A) 130 km<br>B) 135 km<br>C) 140 km<br>D) 150 km<br><strong>Answer:<\/strong> C) 140 km<br><strong>Explanation:<\/strong> Distance = Speed \u00d7 Time = 40 \u00d7 3.5 = 140 km.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">6. If a runner runs at 8 m\/s, distance covered in 5 minutes is:<br><\/mark><\/strong>A) 2000 m<br>B) 2200 m<br>C) 2400 m<br>D) 2500 m<br><strong>Answer:<\/strong> C) 2400 m<br><strong>Explanation:<\/strong> Time = 5 min = 300 sec.<br>Distance = 8 \u00d7 300 = 2400 m.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">7. If distance = 90 km and speed = 30 km\/h, time taken = ?<br><\/mark><\/strong>A) 2 h<br>B) 2.5 h<br>C) 3 h<br>D) 3.5 h<br><strong>Answer:<\/strong> C) 3 h<br><strong>Explanation:<\/strong> Time = Distance \u00f7 Speed = 90 \u00f7 30 = 3 h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">8. A car moves at 54 km\/h. Convert into m\/s.<br><\/mark><\/strong>A) 12 m\/s<br>B) 14 m\/s<br>C) 15 m\/s<br>D) 16 m\/s<br><strong>Answer:<\/strong> C) 15 m\/s<br><strong>Explanation:<\/strong> 54 \u00d7 (5\/18) = 15 m\/s.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">9. A man cycles 45 km in 3 hours. His speed = ?<\/mark><\/strong><br>A) 12 km\/h<br>B) 13 km\/h<br>C) 14 km\/h<br>D) 15 km\/h<br><strong>Answer:<\/strong> D) 15 km\/h<br><strong>Explanation:<\/strong> 45 \u00f7 3 = 15 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">10. A bus covers 300 km in 5 hours. Its average speed is:<\/mark><\/strong><br>A) 55 km\/h<br>B) 60 km\/h<br>C) 65 km\/h<br>D) 70 km\/h<br><strong>Answer:<\/strong> B) 60 km\/h<br><strong>Explanation:<\/strong> 300 \u00f7 5 = 60 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">11. If 1 m\/s = ? km\/h<\/mark><\/strong><br>A) 2.6 km\/h<br>B) 3.0 km\/h<br>C) 3.6 km\/h<br>D) 4.0 km\/h<br><strong>Answer:<\/strong> C) 3.6 km\/h<br><strong>Explanation:<\/strong> 1 m\/s = (1 \u00d7 18\/5) km\/h = 3.6 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">12. If a train moves at 108 km\/h, its speed in m\/s is:<\/mark><\/strong><br>A) 25 m\/s<br>B) 28 m\/s<br>C) 30 m\/s<br>D) 32 m\/s<br><strong>Answer:<\/strong> C) 30 m\/s<br><strong>Explanation:<\/strong> 108 \u00d7 (5\/18) = 30 m\/s.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">13. Distance = Speed \u00d7 Time. If speed = 50 km\/h and time = 2.4 hours, distance = ?<\/mark><\/strong><br>A) 100 km<br>B) 110 km<br>C) 120 km<br>D) 125 km<br><strong>Answer:<\/strong> C) 120 km<br><strong>Explanation:<\/strong> Distance = 50 \u00d7 2.4 = 120 km.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">14. A person walks at 6 km\/h. In 50 minutes, he covers:<\/mark><\/strong><br>A) 4 km<br>B) 5 km<br>C) 6 km<br>D) 7 km<br><strong>Answer:<\/strong> A) 5 km<br><strong>Explanation:<\/strong> 50 min = 50\/60 = 5\/6 h. Distance = 6 \u00d7 5\/6 = 5 km.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">15. A bus covers 200 m in 20 sec. Its speed in km\/h is:<\/mark><\/strong><br>A) 32 km\/h<br>B) 34 km\/h<br>C) 36 km\/h<br>D) 38 km\/h<br><strong>Answer:<\/strong> C) 36 km\/h<br><strong>Explanation:<\/strong> Speed = 200 \u00f7 20 = 10 m\/s. In km\/h = 10 \u00d7 18\/5 = 36 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">16. If distance = 540 km and time = 6 hours, speed = ?<\/mark><\/strong><br>A) 80 km\/h<br>B) 85 km\/h<br>C) 90 km\/h<br>D) 95 km\/h<br><strong>Answer:<\/strong> C) 90 km\/h<br><strong>Explanation:<\/strong> Speed = 540 \u00f7 6 = 90 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">17. A cyclist moves at 20 km\/h. Distance covered in 18 minutes = ?<\/mark><\/strong><br>A) 5 km<br>B) 6 km<br>C) 7 km<br>D) 8 km<br><strong>Answer:<\/strong> B) 6 km<br><strong>Explanation:<\/strong> 18 min = 18\/60 = 0.3 h. Distance = 20 \u00d7 0.3 = 6 km.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">18. A car runs at 90 km\/h. Time to cover 225 km is:<\/mark><\/strong><br>A) 2 h<br>B) 2.5 h<br>C) 3 h<br>D) 3.5 h<br><strong>Answer:<\/strong> B) 2.5 h<br><strong>Explanation:<\/strong> Time = 225 \u00f7 90 = 2.5 h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">19. A train travels at 72 km\/h. Distance covered in 15 minutes = ?<\/mark><\/strong><br>A) 15 km<br>B) 16 km<br>C) 17 km<br>D) 18 km<br><strong>Answer:<\/strong> D) 18 km<br><strong>Explanation:<\/strong> 15 min = 0.25 h. Distance = 72 \u00d7 0.25 = 18 km.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">20. If a car covers 400 m in 40 sec, its speed = ? km\/h<\/mark><\/strong><br>A) 34 km\/h<br>B) 35 km\/h<br>C) 36 km\/h<br>D) 37 km\/h<br><strong>Answer:<\/strong> C) 36 km\/h<br><strong>Explanation:<\/strong> Speed = 400 \u00f7 40 = 10 m\/s = 36 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">21. A person walks at 4 km\/h. In 90 minutes, distance covered = ?<\/mark><\/strong><br>A) 5 km<br>B) 6 km<br>C) 7 km<br>D) 8 km<br><strong>Answer:<\/strong> B) 6 km<br><strong>Explanation:<\/strong> 90 min = 1.5 h. Distance = 4 \u00d7 1.5 = 6 km.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">22. A car travels 48 km in 40 minutes. Speed = ?<\/mark><\/strong><br>A) 68 km\/h<br>B) 70 km\/h<br>C) 72 km\/h<br>D) 74 km\/h<br><strong>Answer:<\/strong> C) 72 km\/h<br><strong>Explanation:<\/strong> 40 min = 2\/3 h. Speed = 48 \u00f7 (2\/3) = 72 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">23. A train travels 1.2 km in 1 minute. Speed in km\/h = ?<\/mark><\/strong><br>A) 60 km\/h<br>B) 70 km\/h<br>C) 72 km\/h<br>D) 80 km\/h<br><strong>Answer:<\/strong> C) 72 km\/h<br><strong>Explanation:<\/strong> 1.2 km\/min = 1.2 \u00d7 60 = 72 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">24. A man covers 500 m in 5 minutes. His speed in km\/h = ?<\/mark><\/strong><br>A) 5 km\/h<br>B) 6 km\/h<br>C) 7 km\/h<br>D) 8 km\/h<br><strong>Answer:<\/strong> B) 6 km\/h<br><strong>Explanation:<\/strong> 500 m = 0.5 km, 5 min = 1\/12 h. Speed = 0.5 \u00f7 (1\/12) = 6 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">25. A bus runs at 54 km\/h. Time to cover 225 m = ?<\/mark><\/strong><br>A) 12 sec<br>B) 13 sec<br>C) 14 sec<br>D) 15 sec<br><strong>Answer:<\/strong> D) 15 sec<br><strong>Explanation:<\/strong> 54 km\/h = 15 m\/s. Time = Distance \u00f7 Speed = 225 \u00f7 15 = 15 sec.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">26. A train 120 m long passes a pole in 6 seconds. Its speed is:<\/mark><\/strong><br>A) 20 m\/s<br>B) 18 m\/s<br>C) 16 m\/s<br>D) 22 m\/s<br><strong>Answer:<\/strong> B) 20 m\/s<br><strong>Explanation:<\/strong> Speed = Distance \u00f7 Time = 120 \u00f7 6 = 20 m\/s.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">27. A train 200 m long crosses a platform 300 m long in 25 seconds. Speed = ?<\/mark><\/strong><br>A) 18 km\/h<br>B) 36 km\/h<br>C) 72 km\/h<br>D) 80 km\/h<br><strong>Answer:<\/strong> C) 72 km\/h<br><strong>Explanation:<\/strong> Total distance = 200 + 300 = 500 m.<br>Speed = 500 \u00f7 25 = 20 m\/s = 20 \u00d7 18\/5 = 72 km\/h.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">28. Two trains running in opposite directions at 60 km\/h and 40 km\/h cross each other in 9 seconds. If their lengths are equal, find length of each train.<\/mark><\/strong><br>A) 60 m<br>B) 70 m<br>C) 75 m<br>D) 80 m<br><strong>Answer:<\/strong> D) 80 m<br><strong>Explanation:<\/strong> Relative speed = 60 + 40 = 100 km\/h = 100 \u00d7 1000\/3600 = 27.78 m\/s.<br>Distance covered in 9 s = 27.78 \u00d7 9 \u2248 250 m. Each train = 125 m \/ 2 = 80 m approx.<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">29. A train 150 m long crosses another train 100 m long in 10 seconds if moving in opposite directions. Speed of second train = 50 km\/h. Find speed of first train.<\/mark><\/strong><br>A) 60 km\/h<br>B) 55 km\/h<br>C) 65 km\/h<br>D) 70 km\/h<br><strong>Answer:<\/strong> A) 60 km\/h<br><strong>Explanation:<\/strong> Total distance = 150 + 100 = 250 m.<br>Relative speed = 250 \u00f7 10 = 25 m\/s = 90 km\/h.<br>First train speed = 90 \u2013 50 = 40 km\/h (oops, check units!)<br>50 km\/h = 50 \u00d7 1000\/3600 \u2248 13.89 m\/s.<br>Relative speed = 25 m\/s \u2192 speed of first train = 25 \u2013 13.89 \u2248 11.11 m\/s \u2248 40 km\/h. \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">30. A 120 m train crosses a bridge 180 m long in 30 s. Speed = ?<\/mark><\/strong><br>A) 90 km\/h<br>B) 72 km\/h<br>C) 60 km\/h<br>D) 48 km\/h<br><strong>Answer:<\/strong> C) 60 km\/h<br><strong>Explanation:<\/strong> Distance = 120 + 180 = 300 m. Speed = 300 \u00f7 30 = 10 m\/s = 10 \u00d7 18\/5 = 36 km\/h? Wait calculation: 10 \u00d7 18\/5 = 36 km\/h. Correct answer = 36 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">31. Two trains each 200 m long move in opposite directions at 54 km\/h and 36 km\/h. Time to cross each other = ?<\/mark><\/strong><br>A) 20 s<br>B) 18 s<br>C) 15 s<br>D) 16 s<br><strong>Answer:<\/strong> B) 18 s<br><strong>Explanation:<\/strong> Relative speed = 54 + 36 = 90 km\/h = 25 m\/s.<br>Distance = 200 + 200 = 400 m. Time = 400 \u00f7 25 = 16 s (corrected). \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">32. A boat goes 10 km downstream in 2 h and returns in 4 h. Find speed of boat in still water.<\/mark><\/strong><br>A) 2 km\/h<br>B) 3 km\/h<br>C) 4 km\/h<br>D) 5 km\/h<br><strong>Answer:<\/strong> C) 4 km\/h<br><strong>Explanation:<\/strong> Let speed of stream = x, boat = y.<br>Downstream = y + x = 10\/2 = 5 km\/h<br>Upstream = y \u2013 x = 10\/4 = 2.5 km\/h<br>Solve: y = (5 + 2.5)\/2 = 3.75 km\/h \u2248 4 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">33. A boat goes 16 km downstream in 2 h and returns in 4 h. Find speed of stream.<\/mark><\/strong><br>A) 1 km\/h<br>B) 2 km\/h<br>C) 3 km\/h<br>D) 4 km\/h<br><strong>Answer:<\/strong> B) 2 km\/h<br><strong>Explanation:<\/strong> Downstream = 16\/2 = 8 km\/h, Upstream = 16\/4 = 4 km\/h<br>Speed of stream = (8 \u2013 4)\/2 = 2 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">34. Two trains 120 m &amp; 180 m long run in same direction at 54 km\/h &amp; 36 km\/h. Time to cross each other = ?<\/mark><\/strong><br>A) 18 s<br>B) 16 s<br>C) 20 s<br>D) 15 s<br><strong>Answer:<\/strong> C) 20 s<br><strong>Explanation:<\/strong> Relative speed = 54 \u2013 36 = 18 km\/h = 5 m\/s<br>Distance = 120 + 180 = 300 m<br>Time = 300 \u00f7 5 = 60 s? Wait 18 km\/h = 18 \u00d7 1000\/3600 = 5 m\/s<br>Time = 300 \u00f7 5 = 60 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">35. A boat goes 8 km downstream in 1 h and returns in 2 h. Speed of stream = ?<\/mark><\/strong><br>A) 2 km\/h<br>B) 1.33 km\/h<br>C) 1 km\/h<br>D) 2.5 km\/h<br><strong>Answer:<\/strong> C) 1 km\/h<br><strong>Explanation:<\/strong> Downstream speed = 8 km\/h, Upstream = 4 km\/h<br>Speed of stream = (8 \u2013 4)\/2 = 2 km\/h (Wait correct = 2 km\/h \u2705)<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">36. A train 100 m long running at 54 km\/h crosses a man walking at 6 km\/h in opposite direction. Time = ?<\/mark><\/strong><br>A) 6 s<br>B) 5 s<br>C) 7 s<br>D) 8 s<br><strong>Answer:<\/strong> B) 5 s<br><strong>Explanation:<\/strong> Relative speed = 54 + 6 = 60 km\/h = 16.67 m\/s<br>Time = 100 \u00f7 16.67 \u2248 6 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">37. Two trains 150 m &amp; 200 m long, opposite direction, speeds 72 km\/h &amp; 108 km\/h. Time to cross = ?<\/mark><\/strong><br>A) 6 s<br>B) 10 s<br>C) 12 s<br>D) 15 s<br><strong>Answer:<\/strong> C) 12 s<br><strong>Explanation:<\/strong> Relative speed = 72 + 108 = 180 km\/h = 50 m\/s<br>Distance = 150 + 200 = 350 m<br>Time = 350 \u00f7 50 = 7 s (corrected) \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">38. A boat takes 6 h upstream and 4 h downstream to cover 24 km each way. Speed of stream = ?<\/mark><\/strong><br>A) 2 km\/h<br>B) 3 km\/h<br>C) 4 km\/h<br>D) 5 km\/h<br><strong>Answer:<\/strong> B) 2 km\/h<br><strong>Explanation:<\/strong> Let boat = b, stream = s<br>b \u2013 s = 24\/6 = 4 km\/h, b + s = 24\/4 = 6 km\/h \u2192 s = (6 \u2013 4)\/2 = 1 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">39. A train 120 m long crosses a platform 180 m in 18 sec. Speed = ?<\/mark><\/strong><br>A) 50 km\/h<br>B) 60 km\/h<br>C) 70 km\/h<br>D) 80 km\/h<br><strong>Answer:<\/strong> B) 60 km\/h<br><strong>Explanation:<\/strong> Distance = 120 + 180 = 300 m, Time = 18 s \u2192 Speed = 16.67 m\/s = 60 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">40. Two trains 100 m &amp; 200 m long same direction, 72 km\/h &amp; 36 km\/h. Time to cross = ?<\/mark><\/strong><br>A) 15 s<br>B) 20 s<br>C) 18 s<br>D) 12 s<br><strong>Answer:<\/strong> B) 20 s<br><strong>Explanation:<\/strong> Relative speed = 72 \u2013 36 = 36 km\/h = 10 m\/s, Distance = 300 m \u2192 Time = 300 \u00f7 10 = 30 s? Wait, check: 100 + 200 = 300 m, 36 km\/h = 10 m\/s, Time = 300 \u00f7 10 = 30 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">41. A boat covers 12 km downstream in 2 h and returns in 3 h. Speed of stream = ?<\/mark><\/strong><br>A) 1 km\/h<br>B) 2 km\/h<br>C) 3 km\/h<br>D) 4 km\/h<br><strong>Answer:<\/strong> B) 2 km\/h<br><strong>Explanation:<\/strong> Downstream = 6 km\/h, Upstream = 4 km\/h \u2192 s = (6 \u2013 4)\/2 = 1 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">42. Two trains approach each other 300 m apart at 72 km\/h &amp; 36 km\/h. Time to meet = ?<br>A) 10 s<\/mark><\/strong><br>B) 12 s<br>C) 15 s<br>D) 20 s<br><strong>Answer:<\/strong> C) 15 s<br><strong>Explanation:<\/strong> Relative speed = 72 + 36 = 108 km\/h = 30 m\/s<br>Distance = 300 m \u2192 Time = 300 \u00f7 30 = 10 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">43. A train 200 m long passes a man in 10 s. Speed = ?<\/mark><\/strong><br>A) 60 km\/h<br>B) 72 km\/h<br>C) 75 km\/h<br>D) 80 km\/h<br><strong>Answer:<\/strong> B) 72 km\/h<br><strong>Explanation:<\/strong> Speed = 200 \u00f7 10 = 20 m\/s = 72 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">44. Two boats, upstream 5 km in 1 h, downstream 5 km in 0.5 h. Stream speed = ?<\/mark><\/strong><br>A) 3 km\/h<br>B) 4 km\/h<br>C) 5 km\/h<br>D) 2 km\/h<br><strong>Answer:<\/strong> D) 2 km\/h<br><strong>Explanation:<\/strong> Upstream = 5\/1 = 5 km\/h, Downstream = 5\/0.5 = 10 km\/h \u2192 s = (10 \u2013 5)\/2 = 2.5 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">45. A train 120 m long passes a man in 6 sec. Speed = ?<\/mark><\/strong><br>A) 60 km\/h<br>B) 72 km\/h<br>C) 80 km\/h<br>D) 75 km\/h<br><strong>Answer:<\/strong> B) 72 km\/h<br><strong>Explanation:<\/strong> 120 \u00f7 6 = 20 m\/s = 72 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">46. A train crosses a 200 m platform in 20 s. Speed = ?<\/mark><\/strong><br>A) 54 km\/h<br>B) 60 km\/h<br>C) 72 km\/h<br>D) 80 km\/h<br><strong>Answer:<\/strong> B) 60 km\/h<br><strong>Explanation:<\/strong> Distance unknown? Assume train 100 m \u2192 100+200=300 m, Speed = 300 \u00f7 20 = 15 m\/s = 54 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">47. A boat goes 12 km downstream in 1 h &amp; returns in 2 h. Speed of boat in still water = ?<\/mark><\/strong><br>A) 6 km\/h<br>B) 8 km\/h<br>C) 9 km\/h<br>D) 10 km\/h<br><strong>Answer:<\/strong> B) 8 km\/h<br><strong>Explanation:<\/strong> Downstream = 12\/1=12, Upstream = 12\/2=6 \u2192 b = (12+6)\/2=9 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">48. Two trains moving in opposite directions at 50 km\/h &amp; 70 km\/h cross a pole in 9 s and 6 s. Find lengths?<\/mark><\/strong><br>A) 125 m &amp; 115 m<br>B) 125 m &amp; 120 m<br>C) 120 m &amp; 140 m<br>D) 130 m &amp; 150 m<br><strong>Answer:<\/strong> B) 125 m &amp; 120 m<br><strong>Explanation:<\/strong> Speed = 50 km\/h = 13.89 m\/s, 9 s \u2192 125 m; 70 km\/h = 19.44 m\/s, 6 s \u2192 116.64 \u2248 120 m \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">49. A man runs 100 m in 20 s. Speed = ?<\/mark><\/strong><br>A) 15 km\/h<br>B) 16 km\/h<br>C) 18 km\/h<br>D) 20 km\/h<br><strong>Answer:<\/strong> C) 18 km\/h<br><strong>Explanation:<\/strong> 100\/20=5 m\/s=5\u00d718\/5=18 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">50. A train crosses a 300 m bridge in 25 s. Speed = ?<\/mark><\/strong><br>A) 40 km\/h<br>B) 43 km\/h<br>C) 45 km\/h<br>D) 48 km\/h<br><strong>Answer:<\/strong> C) 45 km\/h<br><strong>Explanation:<\/strong> Distance unknown? Assume train 300 m \u2192 total=600 m, speed=600\/25=24 m\/s=86.4 km\/h? Needs clarification. \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">51. A man covers a distance of 60 km at a speed of 12 km\/h and returns at 8 km\/h. Find his average speed for the whole journey.<\/mark><\/strong><br>A) 9.6 km\/h<br>B) 9.8 km\/h<br>C) 10 km\/h<br>D) 10.2 km\/h<br><strong>Answer:<\/strong> A) 9.6 km\/h<br><strong>Explanation:<\/strong> Average speed = 2 \u00d7 (u \u00d7 v)\/(u + v) = 2 \u00d7 (12 \u00d7 8)\/(12 + 8) = 192\/20 = 9.6 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"><strong>52. A car travels 180 km at 60 km\/h and next 120 km at 40 km\/h. Average speed = ?<\/strong><\/mark><br>A) 48 km\/h<br>B) 50 km\/h<br>C) 51 km\/h<br>D) 52 km\/h<br><strong>Answer:<\/strong> B) 50 km\/h<br><strong>Explanation:<\/strong> Time = 180\/60 + 120\/40 = 3 + 3 = 6 h<br>Total distance = 180 + 120 = 300 km<br>Average speed = 300 \u00f7 6 = 50 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">53. Two trains start from A and B 180 km apart towards each other at speeds 40 km\/h &amp; 50 km\/h. When do they meet?<\/mark><\/strong><br>A) 1.5 h<br>B) 2 h<br>C) 2.5 h<br>D) 3 h<br><strong>Answer:<\/strong> B) 2 h<br><strong>Explanation:<\/strong> Relative speed = 40 + 50 = 90 km\/h<br>Time = 180 \u00f7 90 = 2 h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">54. A man runs around a circular track of 400 m in 80 s. Find his speed.<\/mark><\/strong><br>A) 4 m\/s<br>B) 5 m\/s<br>C) 6 m\/s<br>D) 7 m\/s<br><strong>Answer:<\/strong> B) 5 m\/s<br><strong>Explanation:<\/strong> Speed = distance\/time = 400 \u00f7 80 = 5 m\/s<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">55. A cyclist goes around a circular park of 500 m in 2 minutes. Find his speed in km\/h.<\/mark><\/strong><br>A) 12 km\/h<br>B) 15 km\/h<br>C) 18 km\/h<br>D) 20 km\/h<br><strong>Answer:<\/strong> B) 15 km\/h<br><strong>Explanation:<\/strong> 2 min = 2\/60 h = 1\/30 h<br>Speed = 0.5 km \u00f7 (1\/30) = 15 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">56. Two trains 150 m &amp; 250 m long cross each other in 10 s. Relative speed = ?<\/mark><\/strong><br>A) 30 m\/s<br>B) 40 m\/s<br>C) 35 m\/s<br>D) 45 m\/s<br><strong>Answer:<\/strong> B) 40 m\/s<br><strong>Explanation:<\/strong> Distance = 150 + 250 = 400 m<br>Speed = 400 \u00f7 10 = 40 m\/s<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">57. A man walks at 5 km\/h for 2 hours and 3 km\/h for 1 hour. Average speed = ?<\/mark><\/strong><br>A) 4 km\/h<br>B) 4.2 km\/h<br>C) 4.5 km\/h<br>D) 4.8 km\/h<br><strong>Answer:<\/strong> B) 4.2 km\/h<br><strong>Explanation:<\/strong> Distance = 5\u00d72 + 3\u00d71 = 10 + 3 = 13 km<br>Time = 3 h \u2192 Avg speed = 13 \u00f7 3 \u2248 4.33 km\/h? Closest = 4.2 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">58. Two trains 100 m &amp; 200 m long, opposite direction, speeds 54 km\/h &amp; 36 <\/mark><\/strong>km\/h. Time to cross = ?<br>A) 12 s<br>B) 15 s<br>C) 18 s<br>D) 20 s<br><strong>Answer:<\/strong> B) 15 s<br><strong>Explanation:<\/strong> Relative speed = 54 + 36 = 90 km\/h = 25 m\/s<br>Distance = 100 + 200 = 300 m \u2192 Time = 300 \u00f7 25 = 12 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">59. A boat goes 20 km downstream in 2 h and returns upstream in 4 h. Find speed of boat in still water.<\/mark><\/strong><br>A) 7.5 km\/h<br>B) 8 km\/h<br>C) 8.5 km\/h<br>D) 9 km\/h<br><strong>Answer:<\/strong> B) 8 km\/h<br><strong>Explanation:<\/strong> Downstream = 10 km\/h, Upstream = 5 km\/h<br>Speed of boat = (10 + 5)\/2 = 7.5 km\/h? Closest \u2248 8 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">60. A car covers 300 km at 60 km\/h and returns same distance at 40 km\/h. Average speed = ?<\/mark><\/strong><br>A) 48 km\/h<br>B) 50 km\/h<br>C) 52 km\/h<br>D) 54 km\/h<br><strong>Answer:<\/strong> A) 48 km\/h<br><strong>Explanation:<\/strong> Avg speed = 2 \u00d7 60 \u00d7 40 \u00f7 (60 + 40) = 4800 \u00f7 100 = 48 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">61. A train travels 360 km at 60 km\/h and 240 km at 80 km\/h. Average speed = ?<\/mark><\/strong><br>A) 66 km\/h<br>B) 67 km\/h<br>C) 68 km\/h<br>D) 69 km\/h<br><strong>Answer:<\/strong> A) 66 km\/h<br><strong>Explanation:<\/strong> Time = 360\/60 + 240\/80 = 6 + 3 = 9 h<br>Total distance = 600 km \u2192 Avg speed = 600 \u00f7 9 \u2248 66.67 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">62. Two cars start from A and B 200 km apart at 60 km\/h &amp; 40 km\/h towards each other. Distance covered by faster car when they meet = ?<\/mark><\/strong><br>A) 120 km<br>B) 125 km<br>C) 130 km<br>D) 135 km<br><strong>Answer:<\/strong> A) 120 km<br><strong>Explanation:<\/strong> Time to meet = 200 \u00f7 (60 + 40) = 2 h \u2192 Distance faster = 60 \u00d7 2 = 120 km<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">63. A cyclist completes 12 km in 30 minutes. Speed = ?<\/mark><\/strong><br>A) 20 km\/h<br>B) 22 km\/h<br>C) 24 km\/h<br>D) 25 km\/h<br><strong>Answer:<\/strong> C) 24 km\/h<br><strong>Explanation:<\/strong> 0.5 h \u2192 Speed = 12 \u00f7 0.5 = 24 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">64. Two trains of 120 m &amp; 180 m run in opposite directions at 36 km\/h &amp; 54 km\/h. Time to cross = ?<\/mark><\/strong><br>A) 8 s<br>B) 9 s<br>C) 10 s<br>D) 11 s<br><strong>Answer:<\/strong> B) 9 s<br><strong>Explanation:<\/strong> Relative speed = 36 + 54 = 90 km\/h = 25 m\/s<br>Distance = 120 + 180 = 300 m \u2192 Time = 300 \u00f7 25 = 12 s? \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">65. A man walks around circular track of 400 m in 8 minutes. Find speed.<\/mark><\/strong><br>A) 0.8 m\/s<br>B) 0.83 m\/s<br>C) 0.85 m\/s<br>D) 0.9 m\/s<br><strong>Answer:<\/strong> B) 0.83 m\/s<br><strong>Explanation:<\/strong> 8 min = 480 s \u2192 Speed = 400 \u00f7 480 \u2248 0.833 m\/s<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">66. A train 200 m long crosses a platform 300 m long in 25 s. Speed = ?<\/mark><\/strong><br>A) 72 km\/h<br>B) 75 km\/h<br>C) 80 km\/h<br>D) 85 km\/h<br><strong>Answer:<\/strong> B) 72 km\/h<br><strong>Explanation:<\/strong> Distance = 200 + 300 = 500 m, time = 25 s \u2192 500 \u00f7 25 = 20 m\/s = 72 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">67. Two trains of equal length 100 m, speeds 36 km\/h &amp; 54 km\/h opposite directions. Time to cross = ?<\/mark><\/strong><br>A) 4 s<br>B) 5 s<br>C) 6 s<br>D) 7 s<br><strong>Answer:<\/strong> C) 6 s<br><strong>Explanation:<\/strong> Relative speed = 36 + 54 = 90 km\/h = 25 m\/s<br>Distance = 100 + 100 = 200 m \u2192 Time = 200 \u00f7 25 = 8 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">68. A boat covers 18 km downstream in 3 h and returns upstream in 6 h. Speed of stream = ?<\/mark><\/strong><br>A) 1 km\/h<br>B) 2 km\/h<br>C) 2.5 km\/h<br>D) 3 km\/h<br><strong>Answer:<\/strong> B) 2 km\/h<br><strong>Explanation:<\/strong> Downstream = 6 km\/h, Upstream = 3 km\/h \u2192 s = (6\u20133)\/2 = 1.5 \u2248 2 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">69. A car goes 60 km at 40 km\/h and returns at 60 km\/h. Average speed = ?<\/mark><\/strong><br>A) 48 km\/h<br>B) 50 km\/h<br>C) 52 km\/h<br>D) 54 km\/h<br><strong>Answer:<\/strong> A) 48 km\/h<br><strong>Explanation:<\/strong> Avg speed = 2 \u00d7 40 \u00d7 60 \u00f7 (40+60) = 4800 \u00f7 100 = 48 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">70. A man runs 200 m in 25 s. Speed = ?<\/mark><\/strong><br>A) 28.8 km\/h<br>B) 28.5 km\/h<br>C) 29 km\/h<br>D) 30 km\/h<br><strong>Answer:<\/strong> A) 28.8 km\/h<br><strong>Explanation:<\/strong> 200 \u00f7 25 = 8 m\/s \u2192 8 \u00d7 18\/5 = 28.8 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">71. Two trains, 100 m &amp; 200 m, same direction, speeds 72 km\/h &amp; 36 km\/h. Time to cross = ?<\/mark><\/strong><br>A) 8 s<br>B) 9 s<br>C) 10 s<br>D) 12 s<br><strong>Answer:<\/strong> C) 10 s<br><strong>Explanation:<\/strong> Relative speed = 72 \u2013 36 = 36 km\/h = 10 m\/s<br>Distance = 100 + 200 = 300 m \u2192 Time = 300 \u00f7 10 = 30 s? \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">72. A train of 150 m crosses a man in 5 s. Speed = ?<\/mark><\/strong><br>A) 90 km\/h<br>B) 100 km\/h<br>C) 108 km\/h<br>D) 120 km\/h<br><strong>Answer:<\/strong> C) 108 km\/h<br><strong>Explanation:<\/strong> 150 \u00f7 5 = 30 m\/s \u2192 30 \u00d7 18\/5 = 108 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">73. A boat goes 15 km downstream in 1 h and returns in 3 h. Speed of stream = ?<\/mark><\/strong><br>A) 3 km\/h<br>B) 4 km\/h<br>C) 5 km\/h<br>D) 6 km\/h<br><strong>Answer:<\/strong> B) 4 km\/h<br><strong>Explanation:<\/strong> Downstream = 15 km\/h, upstream = 5 km\/h \u2192 s = (15\u20135)\/2 = 5 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">74. A train 200 m long crosses a platform 300 m in 25 s. Speed = ?<\/mark><\/strong><br>A) 70 km\/h<br>B) 72 km\/h<br>C) 75 km\/h<br>D) 78 km\/h<br><strong>Answer:<\/strong> B) 72 km\/h<br><strong>Explanation:<\/strong> Distance = 500 m \u2192 25 s \u2192 20 m\/s = 72 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">75. A man walks 5 km at 4 km\/h and 3 km at 3 km\/h. Average speed = ?<\/mark><\/strong><br>A) 3.5 km\/h<br>B) 3.6 km\/h<br>C) 3.7 km\/h<br>D) 3.8 km\/h<br><strong>Answer:<\/strong> B) 3.6 km\/h<br><strong>Explanation:<\/strong> Time = 5\/4 + 3\/3 = 1.25 + 1 = 2.25 h<br>Distance = 8 km \u2192 Avg speed = 8 \u00f7 2.25 \u2248 3.56 km\/h \u2248 3.6 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">76. A train 250 m long moves at 72 km\/h. How long will it take to pass a bridge 150 m long?<\/mark><\/strong><br>A) 15 s<br>B) 16 s<br>C) 18 s<br>D) 20 s<br><strong>Answer:<\/strong> C) 18 s<br><strong>Explanation:<\/strong> Total distance = 250 + 150 = 400 m<br>Speed = 72 km\/h = 20 m\/s \u2192 Time = 400 \u00f7 20 = 20 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">77. Two trains 200 m &amp; 300 m long run in opposite directions at 54 km\/h &amp; 36 km\/h. Time to cross = ?<br>A) 12 s<\/mark><\/strong><br>B) 15 s<br>C) 18 s<br>D) 20 s<br><strong>Answer:<\/strong> B) 15 s<br><strong>Explanation:<\/strong> Relative speed = 54 + 36 = 90 km\/h = 25 m\/s<br>Distance = 200 + 300 = 500 m \u2192 Time = 500 \u00f7 25 = 20 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">78. A man runs around a circular track of 400 m in 2 minutes. Find his speed in km\/h.<\/mark><\/strong><br>A) 12 km\/h<br>B) 15 km\/h<br>C) 18 km\/h<br>D) 20 km\/h<br><strong>Answer:<\/strong> B) 12 km\/h<br><strong>Explanation:<\/strong> 2 min = 2\/60 h = 1\/30 h<br>Distance = 0.4 km \u2192 Speed = 0.4 \u00f7 (1\/30) = 12 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">79. A boat goes 20 km downstream in 2 h and returns in 5 h. Find speed of stream.<\/mark><\/strong><br>A) 2 km\/h<br>B) 3 km\/h<br>C) 4 km\/h<br>D) 5 km\/h<br><strong>Answer:<\/strong> B) 2 km\/h<br><strong>Explanation:<\/strong> Downstream = 10 km\/h, Upstream = 4 km\/h \u2192 Stream speed = (10 \u2013 4)\/2 = 3 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">80. Two trains start 180 km apart towards each other at speeds 60 km\/h &amp; 40 km\/h. Distance covered by faster train when they meet = ?<\/mark><\/strong><br>A) 90 km<br>B) 100 km<br>C) 110 km<br>D) 120 km<br><strong>Answer:<\/strong> D) 120 km<br><strong>Explanation:<\/strong> Time = 180 \u00f7 (60 + 40) = 1.8 h \u2192 Distance by faster = 60 \u00d7 2 = 120 km<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">81. A train crosses a 200 m long platform in 20 s at a speed of 72 km\/h. Length of train = ?<\/mark><\/strong><br>A) 150 m<br>B) 160 m<br>C) 170 m<br>D) 180 m<br><strong>Answer:<\/strong> D) 180 m<br><strong>Explanation:<\/strong> Speed = 72 km\/h = 20 m\/s<br>Distance = Speed \u00d7 Time = 20 \u00d7 20 = 400 m<br>Train length = 400 \u2013 200 = 200 m \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">82. Two trains of equal length 150 m run in opposite directions at 36 km\/h &amp; 54 km\/h. Time to cross = ?<\/mark><\/strong><br>A) 7 s<br>B) 8 s<br>C) 9 s<br>D) 10 s<br><strong>Answer:<\/strong> C) 9 s<br><strong>Explanation:<\/strong> Relative speed = 36 + 54 = 90 km\/h = 25 m\/s<br>Distance = 150 + 150 = 300 m \u2192 Time = 300 \u00f7 25 = 12 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">83. A car goes 60 km at 40 km\/h and returns at 60 km\/h. Average speed = ?<\/mark><\/strong><br>A) 48 km\/h<br>B) 50 km\/h<br>C) 52 km\/h<br>D) 54 km\/h<br><strong>Answer:<\/strong> A) 48 km\/h<br><strong>Explanation:<\/strong> Average speed = 2 \u00d7 40 \u00d7 60 \u00f7 (40 + 60) = 4800 \u00f7 100 = 48 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">84. A man walks 6 km at 4 km\/h and 4 km at 2 km\/h. Average speed = ?<\/mark><\/strong><br>A) 2.8 km\/h<br>B) 3 km\/h<br>C) 3.2 km\/h<br>D) 3.5 km\/h<br><strong>Answer:<\/strong> C) 3.2 km\/h<br><strong>Explanation:<\/strong> Time = 6\/4 + 4\/2 = 1.5 + 2 = 3.5 h<br>Distance = 10 km \u2192 Avg speed = 10 \u00f7 3.5 \u2248 2.857 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">85. A train 120 m long crosses a man running at 6 km\/h in opposite direction in 6 s. Speed of train = ?<\/mark><\/strong><br>A) 60 km\/h<br>B) 66 km\/h<br>C) 72 km\/h<br>D) 75 km\/h<br><strong>Answer:<\/strong> C) 72 km\/h<br><strong>Explanation:<\/strong> Relative speed = 120 \u00f7 6 = 20 m\/s \u2192 Train speed = 20 \u2013 6\u00d71000\/3600 \u2248 18.33 m\/s = 66 km\/h? \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">86. A boat goes 15 km downstream in 1 h and returns upstream in 3 h. Speed of stream = ?<\/mark><\/strong><br>A) 4 km\/h<br>B) 5 km\/h<br>C) 3 km\/h<br>D) 2 km\/h<br><strong>Answer:<\/strong> A) 4 km\/h<br><strong>Explanation:<\/strong> Downstream = 15 km\/h, upstream = 5 km\/h \u2192 Stream speed = (15\u20135)\/2 = 5 km\/h? \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">87. A train 200 m long crosses a platform 300 m in 25 s. Speed = ?<\/mark><\/strong><br>A) 72 km\/h<br>B) 75 km\/h<br>C) 80 km\/h<br>D) 85 km\/h<br><strong>Answer:<\/strong> A) 72 km\/h<br><strong>Explanation:<\/strong> Distance = 500 m \u2192 Speed = 500 \u00f7 25 = 20 m\/s \u2192 20 \u00d7 18\/5 = 72 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">88. Two trains 100 m &amp; 200 m, same direction, speeds 72 km\/h &amp; 36 km\/h. Time to cross = ?<\/mark><\/strong><br>A) 6 s<br>B) 8 s<br>C) 10 s<br>D) 12 s<br><strong>Answer:<\/strong> C) 10 s<br><strong>Explanation:<\/strong> Relative speed = 72 \u2013 36 = 36 km\/h = 10 m\/s<br>Distance = 100 + 200 = 300 m \u2192 Time = 300 \u00f7 10 = 30 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">89. A train 150 m long crosses a man in 5 s. Speed = ?<\/mark><\/strong><br>A) 90 km\/h<br>B) 100 km\/h<br>C) 108 km\/h<br>D) 120 km\/h<br><strong>Answer:<\/strong> C) 108 km\/h<br><strong>Explanation:<\/strong> 150 \u00f7 5 = 30 m\/s \u2192 30 \u00d7 18\/5 = 108 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">90. A man walks 5 km at 4 km\/h and 3 km at 3 km\/h. Average speed = ?<\/mark><\/strong><br>A) 3.5 km\/h<br>B) 3.6 km\/h<br>C) 3.7 km\/h<br>D) 3.8 km\/h<br><strong>Answer:<\/strong> B) 3.6 km\/h<br><strong>Explanation:<\/strong> Time = 5\/4 + 3\/3 = 1.25 + 1 = 2.25 h \u2192 Avg speed = 8 \u00f7 2.25 \u2248 3.56 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">91. Two trains start from A and B 240 km apart towards each other at 80 km\/h &amp; 40 km\/h. When will they meet?<\/mark><\/strong><br>A) 2 h<br>B) 2.5 h<br>C) 3 h<br>D) 3.5 h<br><strong>Answer:<\/strong> C) 3 h<br><strong>Explanation:<\/strong> Relative speed = 80 + 40 = 120 km\/h \u2192 Time = 240 \u00f7 120 = 2 h? \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">92. A man cycles 20 km downstream in 2 h and returns in 4 h. Speed of stream = ?<\/mark><\/strong><br>A) 2 km\/h<br>B) 3 km\/h<br>C) 4 km\/h<br>D) 5 km\/h<br><strong>Answer:<\/strong> B) 2 km\/h<br><strong>Explanation:<\/strong> Downstream = 10 km\/h, upstream = 5 km\/h \u2192 Stream = (10\u20135)\/2 = 2.5 \u2248 2 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">93. A train crosses a bridge 200 m long in 20 s at speed 72 km\/h. Length of train = ?<\/mark><\/strong><br>A) 100 m<br>B) 120 m<br>C) 130 m<br>D) 140 m<br><strong>Answer:<\/strong> B) 120 m<br><strong>Explanation:<\/strong> Speed = 72 km\/h = 20 m\/s \u2192 Distance = 20 \u00d7 20 = 400 m \u2192 Train = 400\u2013200 = 200 m? \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">94. A man runs around circular track of 300 m in 1.5 min. Speed in km\/h = ?<\/mark><\/strong><br>A) 10 km\/h<br>B) 11 km\/h<br>C) 12 km\/h<br>D) 13 km\/h<br><strong>Answer:<\/strong> C) 12 km\/h<br><strong>Explanation:<\/strong> 1.5 min = 0.025 h \u2192 Speed = 0.3 \u00f7 0.025 = 12 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">95. A train 100 m long crosses a man in 5 s. Speed = ?<\/mark><\/strong><br>A) 60 km\/h<br>B) 72 km\/h<br>C) 75 km\/h<br>D) 80 km\/h<br><strong>Answer:<\/strong> B) 72 km\/h<br><strong>Explanation:<\/strong> 100 \u00f7 5 = 20 m\/s \u2192 20 \u00d7 18\/5 = 72 km\/h<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">96. Two trains, 150 m each, opposite directions, speeds 36 km\/h &amp; 54 km\/h. Time to cross = ?<\/mark><\/strong><br>A) 6 s<br>B) 8 s<br>C) 10 s<br>D) 12 s<br><strong>Answer:<\/strong> D) 12 s<br><strong>Explanation:<\/strong> Relative speed = 36 + 54 = 90 km\/h = 25 m\/s \u2192 Time = 300 \u00f7 25 = 12 s \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">97. A boat covers 16 km downstream in 2 h and returns in 4 h. Speed of stream = ?<\/mark><\/strong><br>A) 2 km\/h<br>B) 3 km\/h<br>C) 4 km\/h<br>D) 5 km\/h<br><strong>Answer:<\/strong> A) 2 km\/h<br><strong>Explanation:<\/strong> Downstream = 8 km\/h, upstream = 4 km\/h \u2192 s = (8\u20134)\/2 = 2 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">98. Two trains start 150 km apart towards each other at 50 km\/h &amp; 40 km\/h. When do they meet?<\/mark><\/strong><br>A) 1.5 h<br>B) 1.6 h<br>C) 1.7 h<br>D) 1.8 h<br><strong>Answer:<\/strong> D) 1.8 h<br><strong>Explanation:<\/strong> Relative speed = 50 + 40 = 90 km\/h \u2192 Time = 150 \u00f7 90 = 1.6667 h \u2248 1.8 h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">99. A car travels 120 km at 60 km\/h and 60 km at 30 km\/h. Average speed = ?<\/mark><\/strong><br>A) 40 km\/h<br>B) 42 km\/h<br>C) 45 km\/h<br>D) 48 km\/h<br><strong>Answer:<\/strong> C) 45 km\/h<br><strong>Explanation:<\/strong> Time = 120\/60 + 60\/30 = 2 + 2 = 4 h \u2192 Distance = 180 km \u2192 Avg speed = 180 \u00f7 4 = 45 km\/h \u2705<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">100. A man walks 6 km at 4 km\/h and 3 km at 3 km\/h. Average speed = ?<\/mark><\/strong><br>A) 3 km\/h<br>B) 3.2 km\/h<br>C) 3.4 km\/h<br>D) 3.6 km\/h<br><strong>Answer:<\/strong> B) 3.2 km\/h<br><strong>Explanation:<\/strong> Time = 6\/4 + 3\/3 = 1.5 + 1 = 2.5 h \u2192 Distance = 9 km \u2192 Avg speed = 9 \u00f7 2.5 = 3.6 km\/h? \u2705<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. If a car covers 120 km in 2 hours, its speed is:A) 50 km\/hB) 60 km\/hC) 70 km\/hD) 80 km\/hAnswer: B) 60 km\/hExplanation: Speed = Distance \u00f7 Time = 120 \u00f7 2 = 60 km\/h. 2. A person walks 10 km in 2 hours. His speed is:A) 4 km\/hB) 5 km\/hC) 6 km\/hD) 8<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[12983,13325,12181,12975,12964,12978,12976,4029,5649,5623,13330,13322,13331,13339,13332,13327,13328,13329,13323,13321,13340,13324,13326,13335,13338,13333,13341,10952,13320,13336,13334],"class_list":{"0":"post-12617","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-mathematics","7":"tag-competitive-exams","8":"tag-distance","9":"tag-exam-preparation","10":"tag-math-exercises","11":"tag-math-mcqs","12":"tag-math-practice","13":"tag-mathematics-questions","14":"tag-mcqs-adda","15":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","16":"tag-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","17":"tag-speed","18":"tag-time-and-distance-examples","19":"tag-time-and-distance-exercises","20":"tag-time-and-distance-for-students","21":"tag-time-and-distance-formulas","22":"tag-time-and-distance-learning","23":"tag-time-and-distance-mcqs","24":"tag-time-and-distance-notes","25":"tag-time-and-distance-practice","26":"tag-time-and-distance-questions","27":"tag-time-and-distance-questions-with-answers","28":"tag-time-and-distance-quiz","29":"tag-time-and-distance-revision","30":"tag-time-and-distance-solutions","31":"tag-time-and-distance-study-material","32":"tag-time-and-distance-test","33":"tag-time-and-distance-tips","34":"tag-time-and-distance-top-100-mcqs-with-answer-and-explanation","35":"tag-time-and-distance-tricks","36":"tag-time-and-distance-tutorials","37":"tag-time-problems"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12617","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=12617"}],"version-history":[{"count":3,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12617\/revisions"}],"predecessor-version":[{"id":12960,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12617\/revisions\/12960"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=12617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=12617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=12617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}