Q. 85.0( 3 Votes )

An echo is return

Answer :

Given


Speed of sound (u) = 342 m/s


Time taken for hearing the echo (t) = 6 s


Now




Distance travelled by the sound = 342 ×6 = 2052 m.


In 6s, sound has to travel twice the distance between the source and reflecting surface. Therefore, the distance of the reflecting surface from the source = = 1026 m


Distance of reflecting surface = 1026 m


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