Two sitar strings A and B playing the note ‘Dha’ are slightly out of tune and produce beats of frequency 5 Hz. The tension of the string B is slightly increased and the beat frequency is found to decrease to 3 Hz. What is the original frequency of B if the frequency of A is 427 Hz ?
A
428 Hz
B
422 Hz
C
430 Hz
D
20 Hz
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The correct Answer is:
D
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