A man standing on a cliff claps his hand hears its echo after 1 s… - Vidyadip

MCQ

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

A
$680 \mathrm{~m}$
B
$340 \mathrm{~m}$
C
$85 \mathrm{~m}$
✓
$170 \mathrm{~m}$

✓

Answer

Correct option: D.

$170 \mathrm{~m}$

(d) If $d$ is the distance between man and reflecting surface of sound then for hearing echo$2 d=v \times t \Rightarrow d=\frac{340 \times 1}{2}=170 \mathrm{~m}$

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