Question

A boy walks from his classroom to the bookshop along a straight corridor towards north . he covers a distance of 20m in 25sec to reach the bookshop . after buying a book, he travel the same distance in the same time to reach back in the classroom. find average speed and average velocity of the boy .

Answer 1

Answer:

4/5 and 0m/s

Explanation:

average speed=20+20/50=40/50=4/5m/s

average velocity=0/50=0m/s

Answer 2

Answer: avg speed=0.8 avg velocity =0

Explanation:for avg speed

Avg speed = total distance / total time

20 + 20/25+25

=40/50 = 0.8

For avg velocity it is zero because the boy returns to his initial position so no displacement covered

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