Question

ennaku return in 3 seconds what is the distance of the reflecting surface from the source given that the speed of sound is 342 m s-1?

Answer 1

Speed =d/t
D=s×t
=342×3=1026 m

Answer 2

☆$\red {HELLO\:DEAR}$☆

Speed of sound, v = 342 m s−1

Echo returns in time, t = 3 s

Distance travelled by sound = v × t = 342 × 3 = 1026 m

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

Hence, the distance of the reflecting surface from the source = (1026/2)m= 513m

☆$\green {VISHU\:PANDAT}$☆

☆$\blue {FOLLOW\:ME}$☆