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A tuning fork A produces 4 beats/sec wit...

A tuning fork A produces 4 beats/sec with another tuning fork B of frequency 320 Hz . On filing the fork A , 4 beats/sec are again heard. The frequency of fork A , after filing is

A

324 Hz

B

320 Hz

C

316 Hz

D

314 Hz

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The correct Answer is:
A
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