Question

A boy goes from point "a" to point "b" in a straight line with a speed of 60 km/hr and returns to a with speed of 40km/hr.Find the average speed

Answer 1

Answer:

24km/h

Explanation:

average speed=total distance/total time.

we'll take the distance between a and b as "x".so..the whole distance traveled in 2x.we'll take first traveled time as t1 and returned time as t2

as we take the formulae s=ut,we'll get x =60t1 and x=40t2.so...by these details,we have 60t1=40t2. so..get t1=2t2/3so..go ahead in this formulae...so you get average speed is 24km/h