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 MS - 1 ?​

Answer 1

• speed = 342m/s
• Time = 3 seconds

Distance = speed × Time

Distance = 342 × 3

Distance = 1026 m = reflecting surface

Answer 2

$\bold{\huge{\underline{\underline{\rm\red{Answer: }}}}}$

→ Speed of sound (v) = 342 ms-1

→ Echo returns in time (t) = 3 s

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

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

Therefore, the distance of reflecting surface from the source = 1026/2 = 513 m.

$\bold{\huge{\underline{\underline{\rm\red{Thanks }}}}}$