Question

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

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Answer 1

Answer:

C-0

Explanation:

The question is velocity and the velocity is displacement/time

The displacement here from A to B is 0

so the answer here is : 0

Answer 2

Answer:

The average velocity of the boy is equal to 0m/min.

Explanation:

The velocity of the boy when he goes from A to B is equal to 20m/min.

The velocity of the boy when he comes back from B to A is equal to 30m/min.

The displacement of the boy for the whole journey is equal to zero because he comes back to point A.

$V_{av}=\frac{Displacement}{time} \\V_{av}=\frac{0}{t} \\V_{av}=0m/min$

So, the average velocity of the boy for the whole journey is equal to 0m/min.