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A source of sound is approaching an obse...

A source of sound is approaching an observer with speed of 30 m/s and the observer is approaching the source with a speed 60 m/s. Then the fractional change in the frequency of sound in air (330 m/s) is

A

`(1)/(3)`

B

`(2)/(5)`

C

`(2)/(2)`

D

`(3)/(10)`

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The correct Answer is:
D
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