Time and work problems speed distance and related quantitative aptitude topics. - One Line Questions

1. A person walks at 4 km/hr. How long will it take him to walk 6 km? — 1.5 hours
2. A boat can travel at 10 km/hr in still water. If the speed of the stream is 2 km/hr, what is the time taken by the boat to travel 24 km downstream? — 2 hours
3. A can complete a piece of work in 18 days. B can complete the same work in 24 days. If they work together for 8 days, what fraction of the work is left? — 1/3
4. A can do a piece of work in 12 days and B can do it in 18 days. They work together for 6 days. The remaining work is done by C alone in 4 days. In how many days can C alone do the work? — 18 days
5. Ram can paint a house in 20 days. Sham can paint the same house in 30 days. If they work together, how long will it take them to paint the house? — 12 days
6. A can do a work in 25 days. B can do it in 20 days. They start working together. After 10 days, B leaves. In how many days will A finish the remaining work? — 15 days
7. Two trains running in opposite directions cross each other in 15 seconds. The first train is 100 meters long and travels at 60 km/hr. The second train is 150 meters long and travels at 48 km/hr. What is the time taken for the first train to pass a man on the second train? — 12 seconds
8. A train traveling at 60 km/hr crosses a platform in 10 seconds. What is the length of the train if the platform is 150 meters long? — 250 meters
9. A train moving at 80 km/hr crosses a man standing on a platform in 5 seconds. What is the length of the train? — 111.11 meters
10. A train traveling at 54 km/hr crosses a signal pole in 10 seconds. What is the length of the train? — 150 meters
11. A train 150 meters long crosses a platform in 15 seconds. If the speed of the train is 60 km/hr, what is the length of the platform? — 150 meters
12. A train traveling at 90 km/hr crosses a train 150 meters long and traveling in the same direction at 72 km/hr in 25 seconds. What is the length of the first train? — 125 meters
13. A car travels at a speed of 72 km/hr. How many meters will it cover in 1 minute? — 1200 meters
14. A man can complete a work in 15 days. He works for 5 days and then B completes the remaining work in 10 days. In how many days can B alone complete the work? — 20 days
15. A can do a work in 20 days and B can do it in 30 days. They work together for 10 days. The remaining work is completed by C in 5 days. In how many days can C alone do the work? — 30 days
16. A and B can do a work in 30 days and 45 days respectively. They start working together, but B leaves after 15 days. In how many days will A finish the remaining work? — 20 days
17. A train of length 200 meters crosses a bridge in 20 seconds. If the speed of the train is 72 km/hr, what is the length of the bridge? — 200 meters
18. A journey is completed in 10 hours. The first half of the journey is covered at 30 km/hr and the second half at 40 km/hr. What is the total distance of the journey? — 171.4 km
19. A train of length 180 meters crosses a platform in 12 seconds. If the speed of the train is 72 km/hr, what is the length of the platform? — 240 meters
20. A can finish a work in 5 days and B can finish it in 10 days. How many days will they take to finish the work if they work together? — 3.5 days
21. Two trains start at the same time from two stations P and Q towards each other. After crossing each other, they take 9 hours and 4 hours respectively to reach their destinations. What is the ratio of their speeds? — 3:2
22. Two trains, P and Q, start at the same time from two stations X and Y towards each other. After crossing each other, train P takes 6 hours to reach Y and train Q takes 2.4 hours to reach X. What is the ratio of the speeds of P and Q? — 2:3
23. A can do a piece of work in 30 days. B can do it in 20 days. They work together for 6 days. The remaining work is done by C in 12 days. In how many days can C alone do the work? — 30 days
24. A can do a work in 15 days. B can do it in 20 days. They work together for 5 days. The remaining work is done by C in 10 days. In how many days can C alone do the work? — 30 days
25. If a man walks at 5 km/hr, he reaches his destination 10 minutes late. If he walks at 6 km/hr, he reaches 5 minutes early. What is the distance he has to cover? — 30 km
26. Two trains of lengths 100 meters and 150 meters are running on parallel tracks at speeds of 40 km/hr and 50 km/hr respectively. In how much time will they cross each other when running in the same direction? — 30 seconds
27. A bus travels from city A to city B in 5 hours. If it reduces its speed by 10 km/hr, it takes 6 hours to cover the same distance. What is the distance between city A and city B? — 300 km
28. A man can row a boat at 9 km/hr in still water. If the river flows at 3 km/hr, what is the time taken to row 48 km downstream? — 4 hours
29. A can complete a work in 40 days. B can complete the same work in 60 days. They work together for 10 days. The remaining work is done by C in 15 days. In how many days can C alone do the work? — 30 days
30. A train 200 meters long crosses a platform in 25 seconds. If the speed of the train is 72 km/hr, what is the length of the platform? — 350 meters
31. A person travels from A to B at 30 km/hr and from B to A at 40 km/hr. What is his average speed for the entire journey? — 34.28 km/hr
32. A can complete a work in 7 days. B can complete the same work in 14 days. If they work together, how many days will it take to complete the work? — 4.67 days
33. A can complete a work in 16 days. B can complete the same work in 12 days. A starts the work and works for 4 days. Then B joins him. In how many days will the remaining work be completed? — 4.5 days
34. A man can row a boat at 12 km/hr in still water. If the river flows at 4 km/hr, what is the time taken to row 80 km downstream? — 5 hours
35. A man covers a distance of 50 km in 10 hours. His average speed is: — 5 km/hr
36. A person travels from point A to point B at a speed of 40 km/hr and returns from B to A at a speed of 60 km/hr. What is the average speed for the entire journey? — 48 km/hr
37. If A can complete a work in 10 days and B can complete the same work in 15 days, in how many days can both A and B complete the work together? — 6 days
38. Two men A and B can complete a work in 10 days and 15 days respectively. They start working together, but A leaves after 5 days. In how many days will B finish the remaining work? — 10 days
39. A man can row a boat at 8 km/hr in still water. If the speed of the stream is 3 km/hr, what is the time taken to row 55 km upstream? — 7 hours
40. A train 100 meters long is moving at 50 km/hr. How long does it take to pass a man standing on the platform? — 6.48 seconds
41. A train 120 meters long passes a pole in 6 seconds. What is the speed of the train in km/hr? — 60 km/hr
42. A train traveling at 72 km/hr crosses a signal pole in 5 seconds. What is the length of the train? — 100 meters
43. A car travels the first 100 km at a speed of 50 km/hr and the next 100 km at a speed of 75 km/hr. What is the average speed of the car for the total journey? — 60 km/hr
44. A and B can complete a work in 10 days and 12 days respectively. They start working together. After 3 days, A leaves. In how many days will B finish the remaining work? — 9 days
45. A and B can do a work in 12 days and 18 days respectively. They start working together. After 6 days, A leaves. In how many days will B finish the remaining work? — 9 days
46. A and B can complete a work in 10 days and 15 days respectively. They start working together. After 4 days, A leaves. In how many days will B finish the remaining work? — 9 days
47. A car travels at 60 km/hr for the first 2 hours and at 80 km/hr for the next 3 hours. What is the average speed of the car for the entire journey? — 68 km/hr
48. A boat travels upstream at 6 km/hr and downstream at 10 km/hr. What is the speed of the boat in still water? — 8 km/hr
49. A train leaves station A at 8:00 AM and reaches station B at 12:00 PM. If the distance between station A and station B is 400 km, what is the speed of the train? — 100 km/hr
50. Two trains are running in opposite directions at 60 km/hr and 36 km/hr. If the length of the first train is 150 meters and it crosses a man on the second train in 5 seconds, what is the length of the second train? — 100 meters
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