Question

An eco is written in 37 what is the distance of reflecting surface from the source considering the speed of sound at 342 metre per second

Answer 1

Your question needs few corrections .

Correct Question : An eco is returned in 3 seconds. what is the distance of reflecting surface from the source considering the speed of sound at 342 metre per second.



Given,
Time taken to return or t = 3 sec
Speed of sound of v = 342 m / s .

Let the distance between the reflecting surface and the source be a,


From the properties of sound :
• $v=\dfrac{2d}{t}$, where v is the speed of sound, t is the time taken for sound to return and d is the distance between the source and the reflecting surface.


Thus,
= > 342 m / s = 2a / 3 s

= > 342 m = 2a / 3

= > 342 x 3 / 2 m = a

= > 171 x 3 m = a

= > 513 m = a



Hence the distance between the source of sound and the reflecting surface is 513 m.
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