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
30m/s. The average velocity of the body during the whole journey is
(a) zero
(b) 25m/s
(c) 24 m/s
(d) none of these

Answer 1

Answer:

zero

Explanation:

Average velocity = Total time/Total displacement

Since, in this case, the particle initial and final points are the same, therefore its Displacement =0.

∴Average velocity=0

Answer 2

let distance be x

so time1 = distance / speed = x/ 20

time2 = distance/ speed = x/ 30

total time = x/20 + x/30 = x/12. ( Plus toh khud kr lena)

so average speed = total distance / total time

= x + x / x/12. = 2x × 12 / x =. 2 × 12 = 24

answer = c

pls mark me as brainiest pls

sorry,. my answer is wrong , I took speed instead of velocity

answer is zero , but take care if there is speed over the answer