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An echo was heard after 3s.What is the distance of the reflecting surface from the source,given that the speed of sound is 342m/s?
Asked by | 12 Jan, 2013, 12:16: PM
answered-by-expert Expert Answer
Speed of sound = 342m/s
Echo returns in time, t =3s
Distance travelled by sound ,= v x t
                                             = 342 x 3
                                             =1026 m
As the sound has to travel twice the distance from the source to and the reflecting surface during an echo.
:. Distance of the reflecting surface from the source
                                         = 1026/2 =513 m
 
Answered by | 12 Jan, 2013, 06:36: PM

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