Time and Distance Questions

The distance between the tops of two building 38 metres and 58 metres high is 52 metres. What will be the distance (in metres) between two buildings?

The speed of car B is half the speed of car A. If car A covers a distance of 120 km in 1.5 hours, what is the speed of car B?

A thief is stopped by a policeman from a distance of 200 metres. When the policeman starts the chase, the thief also starts running. Assuming the speed
of the thief as 8 km/hr and that of police man as 10 km/hr. How far the thief would have run, before he is over ­taken?

A person goes from point N to P and comes back. His average speed for the whole journey is 60 km/hr. If his speed while going from N to P is 40 km/hr, then what will be the speed of the person (in km/hr) while coming back from P to N?

Ram and Rahim standing at a distance of 680m run towards each other at a speed of 8 m/sec and 9 m/sec respectively. After how long will they meet?

Two donkeys are standing 400 meters apart. First donkey can run at a speed of 3 m/sec and the second can run at 2 m/sec. If two donkeys run towards each other after how much time (in sec) will they bump into each other?

A boy crosses a 300 metres wide road in 30 seconds. What is his speed (in km/hr)?

A Lawn roller makes 20 revolutions in one hour. The radius it runs through 25 minutes is