1. A gun is fired at a distance of 6.64 km away from Ram. He hears the sound 20 seconds late. Then the speed of the sound is

2. Suresh goes on a trip on his motor - cycle and rides 410 kms in 9 hours. If he rides for 5 hours at a speed of 50 km/hr, find at what speed he travels for the remaining 4 hours of the journey?

3. A train passes a 90 m long platform in 30 seconds and a man standing on the platform in 15 seconds. The speed of the train is:

4. The time taken by a train 200 metres long, travelling at 45 km/hr, in passing a person walking in the same direction at 5 km/hr will be

5. A man takes 4 hours to row a boat 16 km downstream of a river and 2 hours to cover a distance of 6 km upstream. Find the speed of the river current in km/hr.

6. A train passes a 50 m long platform in 14 s and a man standing on a platform in 10 s. The speed of the train is

7. A train moving at a rate of 36 km/hr crosses a standing man in 10 seconds. It will cross a platform 55 metres long, in:

8. Two trains A and B are running 60 km/hr and 40 km/hr respectively in opposite directions. If train A completely passes a man sitting in the train B in 5 seconds, then the length of the train A is

9. At an average of 80 km/hr Shatabdi Express reaches Ranchi from Kolkata in 7 hrs. Then the distance between Kolkata and Ranchi is

10. Ramakant travelled from his home to a friend’s house. If he covers three equal distances at a speed of 30 km/hr, 15 km/hr, and 10 km/hr respectively, then find out his average speed during the whole journey.

11. The speed of a stream is 3 km/hr. A boat goes 55 km and comes back to the starting point in 16 hours. What is the speed (in km/hr) of the boat in still water?

12. Two cars travel from city A to city B at a speed of 30 km/hr and 36 km/hr respectively. If one car takes 3 hours lesser time than the other car for the journey, then the distance between City A and City B is?

13. A 150 m long train takes 5 sec to cross a man standing on a platform. The speed of the train is

14. Venkatesh covers a certain distance by train at 30 km/h and an equal distance by foot at 6 km/h. If the time taken by him for the whole journey is 3 hr, what is the total distance travelled?

15. A bus covers a distance of 660 metres in 1 minute whereas a car covers a distance of 44 km in 50 minutes. The ratio of their speeds is:

16. The ratio between the speeds of two buses is 11 : 9. If the second bus runs 270 km in 15 hours, then the speed of the first bus is?

17. A person can swim in still water at 4km/h. If the speed of water is 2 km/h, how many hours will the man take to swim against the current for 6 km.

18. A train, 180 m. long, is running at a speed of 90 km/h. How long will it take to pass a post?

19. A man walking with ¾ of his usual speed, reaches office 10 min late. His usual time is

20. Speeds of a boat along the current and against the current are 10 km/hr and 8 km/hr respectively. What is the speed (in km/hr) of the current?

21. A jeep is chasing a car which is 3 km ahead. Their respective speeds are 90 km/hr and 75 km/hr. After how many minutes will the jeep catch the car?

22. A and B start travelling in opposite direction starting from the same spot. A travels at a speed of 65.8 kmph and B is travelling at a speed of 56.4 kmph. What is the distance between them after 3 hours 20 minutes?

23. The speed of a stream is 3 km/hr. A boat goes 36 km and comes back to the starting point in 9 hours. What is the speed (in km/hr) of the boat in still water?

24. A train 150 meters long meets a man going in opposite direction at 5 km/hr and passes him in \(7\frac{1}{5}\) seconds. What is the speed of the train in km/hr?

25. A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the stream are 10 km/hr and 4 km/hr respectively. The distance of the destination from the starting place is

26. A man in a train notices that he can count 24 telephone posts in one minute. If they are known to be 50 meters apart, then at what speed is the train travelling?

27. Aditya travels from plain to hill station which is 240 km apart at an average speed of 40 km/h in his car. In the return trip, he covers the same distance at an average speed of 60 km/h. What is the average speed?

28. A bus is running at a speed of 90 kmph. What distance will it cover in 20 seconds?

29. Mr. and Mrs. X, 72 miles apart from each other, start travelling towards each other at the same time. If Mr. X covers 5 miles/hour to Mrs. X’s 4 mile/hour, how far will Mrs. X have travelled when they meet?

30. A train 110 metres long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going?