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A car with a hom of frequency 620 Hz tra...

A car with a hom of frequency 620 Hz travels towards a large wall with a speed of `20 m//s`. velocity of sound is `330 m//s`. The frequency of echo of sound of hom as heard by the driver is

A

700 Hz

B

660 Hz

C

620 Hz

D

550 Hz

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TARGET PUBLICATION-Sound-Exercise
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