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An echo is heard in 3s. …

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An echo is heard in 3s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342m/s?

Posted by Anurag Kashyap 4 years, 6 months ago

CBSE > Class 09 > Science

2 answers

All Rounder Adarsh 4 years, 6 months ago

513m

0Thank You

Yogita Ingle 4 years, 6 months ago

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

0Thank You

ANSWER

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