Question

A girl claps and hears the echo after reflection from a cliff which is 660m away from her. If the velocity of sound is 330m/s, calculate the time taken for hearing the echo.

Answer 1

Given  

Velocity of time , v = 330 m/s  

Distance from cliff to girl d , = 660 m  

Time taken t, = ?  

We know speed = Distance /time  

t =. d /s or d/v  

t =. 660 /330

= 2 s  

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