An echo is heard in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342ms-1 ?

Asked by Vishal kumar | 2 years ago |  153

##### Solution :-

Speed of sound (v) = 342 $$ms^{-1}$$

Echo returns in time (t) = 3 s

Distance travelled by sound = v × t = 342 × 3 = 1026 m

In the given interval of time, sound must travel a distance which is twice the distance of reflecting surface and source.

Therefore, the distance of reflecting surface from the source = $$\frac{1026}{513}$$ = 513 m.

Answered by Vishal kumar | 2 years ago

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