A man moves from a place P to another place Q with a constant speed of 10 m / sec. and then he returns back to P again with the same constant speed along the same route. Calculate the average speed of the man.
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A man moves from a place P to another place Q with a constant speed of 10 m / sec. and then he returns back to P again with the same constant speed along the same route. Calculate the average speed of the man.

A man moves from a place P to another place Q with a constant speed of 10 m / sec. and then he returns back to P again with the same constant speed along the same route. Calculate the average speed of the man.
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A man moves from a place $P$ to another place $Q$ with a constant speed of $10 {m} / {sec}$. and then he returns back to $P$ again with the same constant speed along the same route. Calculate the average speed of the man.

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ANSWER : $10 {m} / {sec}$.

SOLUTION —

Average speed of the Man —

$=\frac{\text { Total distance }}{\text { Total time }}=\frac{2 {L}}{{L} / 10+{L} / 10}$

$=10 {m} / {sec}$.

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