Question

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

Answer 1

Answer:

Given:

v=342m/s(speed of the sound)

echo returns in time(t)=3seconds

To find:

Distance of reflecting surface from the source

Solution:

Distance travelled=v×t

=342×3

=1026m

In the given interval of time the sound must travel a distance which is twice the distance of reflecting surface and source

Therefore, Distance of reflecting surface from source=1026/2

=513m