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A source of sound and listener are appro...

A source of sound and listener are approaching each other with a speed of 40 m / s . The apparent frequency of note produced by the source is 400 cps . Then, its true frequency (in cps ) is (velocity of sound in air = 360 m / s )

A

420

B

360

C

400

D

320

Text Solution

Verified by Experts

The correct Answer is:
D
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