A man hears his own Eco after 1. 5 seconds. Find the distance of hill from man if speed of sound is 332 m / second in air.
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The distance between man and object = 429 m
Explanation:
When the sound moves to source and then reflect back . It will cover the distance two times . If the distance between man and wall is d .
The distance covered by sound is 2 d .
But the total distance covered = v x t
where v is the velocity of sound and t is the time taken
Therefore d = v x t /2 = 332 x 1.5/2 = 429 m
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