A) 680 m
B) 340 m
C) 85 m
D) 170 m
Correct Answer: D
Solution :
If d is the distance between man and reflecting surface of sound then for hearing echo \[2d=v\times t\Rightarrow d=\frac{340\times 1}{2}=170\,m\]You need to login to perform this action.
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