Question

An echo is returned in 3 seconds what is the distance of the reflecting surface from the source considering the speed of sound as 342 ms-1? In hindi

Answer 1

distance=speed*time/2
=342*3/2
=171*3
=513

Answer 2

Hey dear,


◆ Answer-
s = 513 m

◆ Explaination-
# Given-
T = 3 s
v = 342 m/s

# Solution-
Let s be distance of reflecting surface from source.

For an echo to return sound have to travel forth & back, that is 2s.

To calculate distance we have formula-
Distance = Velocity × time
2s = 342 × 3
s = 342 × 3 / 2
s = 513 m

Therefore, the distance of reflecting surface from source is 513 m.

Hope it helped.
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