Question

A motorcyclist drives from a to b with a uniform speed of 30 km/h and returns back with a speed of 20 km/h. Find its average speed

Answer 1

Answer:

consider, distance bw a to b=x

then find going time=x/30

and returning time=x/20

now total dist.=2x

and total time=x/30+x/20=x/12

now average speed=2x/x/12=24

Answer 2

$\huge\fbox\red{See The Attachment}$

$\huge\boxed{\fcolorbox{red}{ink}{Hope you understand}}$