Question

An echo is heard in 3 seconds after the emissions of sound if the speed of the sound in air is 342m what is the distance of the reflecting surface from the source

Answer 1

Hello friend
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In the example,

Given:

Time,t = 3 second.

Speed of the sound,means the velocity=342m/s.

Distance = ??

So we know that,

Velocity = Distance/time

Distance = Velocity x time

Distance = 342 x 3

Distance = 1026m.

therefore the distance of the reflected surface from the source is 1026m.

I hope this will helps you.

Thanks.

Answer 2

t = 3 sec

v = 340 m/s

2d = v × t

= 340 × 3

= 1020 m

d = 1020 ÷ 2

= 510 metres

distance of the reflecting surface fro the source = 510 m