Q. 63 C

A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo? Speed of sound in air is 33 m/s.

Answer :

A man standing 825 metres away from a cliff (steep rock) fires a gun.

Distance=speed*time


Time= distance/speed


Time= 825/330


Time= 2.5 seconds.


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