Questions
A man stands in front of a hillock and fires a gun. He hears an echo after 1.5 sec. The distance of the hillock from the man is (velocity of sound in air is 330 m/s)
a
220 m
b
247.5 m
c
268.5 m
d
292.5 m
detailed solution
Correct option is B
If d is the distance between man and reflecting surface of sound then for hearing echo 2d=v×t⇒d=330×1.52=247.5 mTalk to our academic expert!
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Velocity of sound in air is
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