Question

A girl claps and hears the echo after reflection from a cliff which is 1200 m away from her. If the velocity of sound is 600 m/s ,calculate the time taken for hearing the echo.

Answer 1

Answer:

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Answer 2

Hello Buddy!

The Answer is 4 seconds.

Formula=

               Given,

          Distance= 1200 m.

           Velocity= 600m/s

                Time=     ?

The Distance TO the cliff is 1200 m. So, when the sound reflects, it again covers 1200 m. for coming back.

      So,

      Total Distance = Distance*2

      Total Distance = 1200 m.*2 = 2400 m.

      Now,

      Time = Distance/Speed or Distance/Velocity

             t = d/s or d/v

             t = 2400/600

               = 4 seconds.

Thus, the time taken for hearing the echo is 4 seconds.

Hope it Helped!