Question

A motorcyclist drives from A to B with a uniform speed of 20 km/h and returns back with a speed of 15 km /h, find his average speed

Answer 1

Answer:

60 km/hr

Explanation:

average speed =  2xy/x+y

where x = speed 1 (in km/hr)

          y = speed 2 (in km/hr)

so answer is => 2x15x20/15+20

                     => 60