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A Girl Claps and Hears the Echo After Reflection from a Cliff Which is 660 M Away. If the Velocity of Sound is 330 Ms-1, Calculate the Time Taken for Hearing the Echo. - Physics

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Question

A girl claps and hears the echo after reflection from a cliff which is 660 m away. If the velocity of sound is 330 ms-1, calculate the time taken for hearing the echo.
Numerical
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Solution

Velocity of sound = `"distance travelled"/"time taken" = (2"d")/"t"`

t = `(2"d")/"v" = (2 xx 660)/330` = 4s

Thus, the girl hears the echo after 4s.

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Chapter 3: Sound - Exercise 1 [Page 148]

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Frank Physics - Part 2 [English] Class 10 ICSE
Chapter 3 Sound
Exercise 1 | Q 5 | Page 148
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