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  • A man standing on a cliff claps his hand hears its echo after . If sound is reflected from m

A man standing on a cliff claps his hand hears its echo after 1 \mathrm{sec}. If sound is reflected from mountain and velocity of sound in air is 340 \mathrm{~m} / \mathrm{s}. Then the distance between the man and reflection point is -
 

Option: 1

680 \mathrm{~m}
 


Option: 2

340 \mathrm{~m}340 \mathrm{\: m}


Option: 3

85 \mathrm{~m}


Option: 4

170 \mathrm{~m}


Answers (1)

best_answer

If \mathrm{d} is the distance between man and relfecting surface of sound, then for hearing echo.

\mathrm{2 d =v \times t }

\mathrm{d =\frac{340 \times 1}{2}=170 \mathrm{~m}}

Hence option 4 is correct.


 

Posted by

Rishabh

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