Question

A body goes from a to b with a velocity of 20m/s and comes back from b to a with a velocity of 30m/s . the average velocity of the body during the whole journey is

Answer 1

Answer:

24 m / sec

Explanation:

since

average vel= total distance/ total time

let x be the the distance between a and b

time taken to go= x/ 20

time taken to come= x/ 30

total time taken= x/20+x/30= x/12 sec

average vel = 2x/ (x/12)= 12×2= 24 m/ sec

ans = 24m/sec