A boy goes to a cycle shop by walk at ` 5 km h^(-1)` and comes back home by cycle at a speed of ` 15 km h^(-1)` , find out the average speed of the boy.

A boy goes from his house to school by bus at a speed of 20 km h^(-1) and returns back through the same route at a speed of 30 km h^(-1) . The average speed of his journey is :

A body moves with a unifrom speed of 10 km h^(-1) for 2h. The average speed of the body is ______ km h^(-1)

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

A boy goes to a 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 boy goes to a 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 motorcyclist drives from A to B with a uniform speed of 30 km h^(-1) and returns back with a speed of 20 kmh^(-1) . Find its average speed.

A motorcyclist drives from A to B with a uniform speed of 30 km h^(-1) and returns back with a speed of 20 kmh^(-1) . Find its average speed.

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 student goes to school at a speed of 4km/h and return back to home at a speed of 6km/h , then average speed of the student is