Question

A boy begins to walk eastward along a straight road from his house. He covers 20 m in 5 mins and then he turns towards west and covers 20 m in 15 mins. His average velocity for whole time interval in equal to (in m/min)

Answer 1

Answer:

0 m/s

Explanation:

Boy goes 20 m East and then again 20 m in west. So boy is at same Place where he was! Hence displacement is zero. and so Velocity is zero.

Answer 2

ANSWER: 20 m/min

Average velocity = Total distance covered / Total time taken

$average \: velocity \: = \frac{total \: distance \: covered}{total \: time \: taken}$

Total distance covered = 20m + 20m

= 40meters

Total time taken = 20 minutes

Average velocity = 40 meters / 20 minutes

$average \: velocity \: = \: \frac{40 \: meters}{20 \: minutes}$

Average velocity = 20 m/min

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