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 aga

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

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 frequenc

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