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The difference between the apparent freq...

 The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is 2% of the frequency of the source. If the speed of sound in air is 300 `ms^(-1)`, the velocity of the source is

A

12 m/s

B

6 m/s

C

`1.5` m/s

D

3 m/s

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The correct Answer is:
D
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