Question

A motorcyclist drive from a to b with uniform speed of 30 km per hour and return form point B to A with uniform speed of 20 km per hour find it average speed

Answer 1

Average velocity= mean of 2 velocities
=(30+20)/2
=25km/he

Answer 2

If the motorcyclist return to again to point where he started, so its displcement =0,
Hence, Avarage velocity =displacement /time
=0/1h=0 answer
If you have a doubt you can ask me and follow me