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A siren emitting sound of frequency 800...

A siren emitting sound of frequency `800 Hz ` is going away from a static listener with a speed of 30 m/s. Frequency of the sound to be heard by the listener is ( Take velocity of sound as 300 m/s )

A

733.3 Hz

B

644.8 Hz

C

481.2 Hz

D

286.5 Hz

Text Solution

Verified by Experts

The correct Answer is:
A
`f.=f((v)/(v+v_(s)))=800((330)/(330+30))=733.33Hz`
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