Question

An echo returned in 3s What is the distance of the reflecting surface from the source given that the speed of sound is 342m/s​

Answer 1

time = 3 seconds

speed = 342 m/s

2d = s×t

2d = 342 × 3

2d = 1026

d = 1026÷ 2

distance = 513 m

{we have taken distance as 2d because the sound energy travels two times, i.e. once from source to wall and other from wall to source}

i hope it helped you.