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The echo of a gun shot is heard 8 sec. a...

The echo of a gun shot is heard 8 sec. after the gun is fired. How far from him is the surface that reflects the sound (velocity of sound in air = 350 m/s )

A

1400 m

B

2800 m

C

700 m

D

350 m

Text Solution

Verified by Experts

The correct Answer is:
A
`t=(2d)/(v)implies8=(2d)/(350)`
`implies d=1400m`.
.
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