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When the listener moves towards a statio...

When the listener moves towards a stationary source with a velocity `V_(L)`, the apparent frequency of a note emitted by the source is `f'`. When the listener moves away from the source with the same velocity, the apparent frequency of the note is `f"`. Given `f'//f"=3` and V as the velocity of sound in air, the value of `V/V_(L)` is

A

3

B

2

C

`1/2`

D

1

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The correct Answer is:
B
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