Question

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

Answer 1

Hey there!

1. Average speed

We know,

Speed = distance/time or s = d/t

Then,

20 = d/t1

t1 = d/20

And, 

30 = d/t2

t2 = d/30

Average speed = total distance/total time

= [2d]/[(d/20) + (d/30)]

= 24 m/s

_____________________________________________________________

2. Average velocity

As net displacement will be zero then average velocity will be also zero.

Hope It Helps You!

please mark it brainliest ❤️