X takes 3 hours longer than Y to walk 30 km. If X doubles his speed, he takes 2 hours less than Y. What is the speed of Y?

A fast train takes 3 hours less than a slow train for a journey of 600 km. If the speed of the slow train is 10 km/hr less than that of the fast train, then the speeds of the two trains are respectiv…

A man walks at an average speed of 3 km/hr from his home and reaches office 40 minutes early. If he walks at an average speed of 2 km/hr, he would reach office 40 minutes late. What is the distance b…

If a train 150 metres long crosses a pole in 12 seconds, then what is the speed of the train in km/h ?

A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?

Walking at the rate of 4 km/h a man covers a certain distance in 2 hours 45 min. Running at a speed of 16.5 km/h, the man will cover the same distance in