a body hears the echo of his own voice from a distance hill after 0. 8sec. if the speed of sound in air is 340m/s calculate the distance of hill from the body.
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Answer:
the hill is at a distance of 850 metres from the body
Explanation:
since echo is heard after 0.8s, meaning that the time taken by the sound to reach the hill and return to the body is 0.8s.
Therefore, the time taken by the sound to reach the man = 1/2 of 0.8
= 0.4s
Now,
speed = distance / time
=> 340/0.4 = distance
=> 850m
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