A train travels between two stations ambala and Amritsar. While goind from Ambala to Amritsar, it takes 3 hours and its average speed is 100km/hr. when coming back from Amritsar of Ambala, it takes 2 hours and it average speed is 150 km/hr. obtain the average speed during the whole journey?

A car travels 20 km in 1 hour and another 40 km in 3 hour. What is the average speed of the car?

A boy goes to school from his home at a speed of x km/hr. and comes back at a speed of y km/hr., then the average speed is given by :

A car travels a distance from A to B at a speed of 60 km h^-1 and returns to A at a speed of 30 km h^-1 . The average speed of the car for the whole journey is:

A car takes 2 hours to reach a destination by travelling at the speed of 60 km/h. How long will it take when the car travels at the speed of 80 km/h?

The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train?

An express train takes 1 hour less than a passenger train to travel 132 km between Mysore and Bangalore (without taking into consideration the time they stop at intermediate stations). If the average speed of the express train is 11 km/hr more than that of the passenger train, find the average speed of the two trains.