Question

For hearing an echo the minimum distance between the source of sound and reflecting body should be 17 m it true or false

Answer 1

Answer:

Since sound has to travel an equal distance in going up to the reflecting surface and in coming back from the reflecting surface, therefore it must travel nearly 33/2 = 16.5m either way. Thus, to hear the echo clearly in the air, the reflecting surface should be at a minimum distance of 16.5m from the source of sound.

Explanation:

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