An echo returned in 3 s. What is the distance of the reflecting surface from the source

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asked Oct 16, 2017 in Physics by jisu zahaan (28,760 points) 28 437 1096

An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 ms−1

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answered Oct 16, 2017 by sforrest072 (157,439 points) 63 448 1287

Time for echo = 3 s 

v = 342 m/s 

Therefore distance: d = v × t = 342×3 m = 513 m.

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