A man covers a certain distance by car driving at 100km/h and he returns back to the starting point riding on a scooter at 45 km/h. Find his average speed for the whole journey.

A man covers a certain distance by car driving at 100km/h and he returns back to the starting point riding on a scooter at 45km/h. Find his average speed for the whole journey.

Sol

Average Speed = 2x100x45/100+45 km/h
                         
                          = 62.06 km/h