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A siren emitting sound of frequency 500 ...

A siren emitting sound of frequency 500 Hz is going away from a static listener with a speed of 50 m / sec . The frequency of sound to be heard, directly from the siren, is

A

434.2 Hz

B

589.3 Hz

C

481.2 Hz

D

286.5 Hz

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The correct Answer is:
A
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