Question

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

Answer 1

Answer:

513m

Explanation:

speed of the sound, v = 342m/s

eco returns in time, t = 3s

distance traveled by the sound = v × t

= 342 × 3

= 1026m

In the given time travel sound has to travel a distance that is twice the distance of the reflecting surface and the source.

So , the distance of the reflecting surface from the source is = 1026 /2m = 513m