Question

A girl clap and hears the echo after reflection from a cliff which is 660 m away from her if the velocity of sound is 330 m/ sec calculate the time taken for hearing the echo

Answer 1

Time duration = time for sound to travel to the cliff and return
= 660/330 + 660/330 sec
= 4 seconds

Answer 2

Hi friend,

Total time taken = time of sending +time of receiving.

Here velocity of sound =330m/s

Then

660/330+660/330
=2+2
=4 seconds.

Hope this helped you a little!!!