Question

a man slaps his hand near a mountain and hears the Eco after 4 seconds. if the speed of sound under these conditions be 330 meter per second what is the distance of mountains from the man :-

A) 660 m

B) 440 m

C) 330 m

D) 550 m

Answer 1

The echo of the sound is heard afterT= 4s.
speed of the under the condition V= 330m/s

The distance traveled by the sound=time taken×speed of the sound=T×V=330×4=1320m.

These is the distance traveled by the sound,the distance between the mountain is the half of the distance traveled by the sound.
Distance between mountain=1320/2=660m.

Option A is correct.
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