A motor cyclist drive from A to B with uniform speed of 30km/hour and returns back with a speed of 20 km/hour. Find the 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 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 motorcylist drives from A to B with a unit speed of 30 kmh^-1 and returns back with a of 20 kmh^-1 . Find its average speed.

A motorist travels from A to B at a speed of 40 km//hr and returns at a speed of 60 km/hr. His average speed will be:

Distance between two stations A and B is 778 km.A train covers the journey from A to B at 84 km per hour and returns back to A with a uniform speed of 56 km per hour.Find the average speed of the train during the whole journey.

Distance between two stations A and B is 778 km. A train covers the journey from A to B at 84 km per hour and returns back B to A with a uniform speed of 56 km per hour. Find the average speed of the train during the whole journey.

A car travels 30 km at a uniform speed of 40 km/h and the next 30 km at a uniform speed of 20 km/h . Find its average speed.