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Two sitar strings A and B playing the n...

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 ?

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The correct Answer is:
`422 Hz`
the frequency of `B lt` frequency of A
`rArrf_(A)-f_(B)=5rArr427-f_(B)=5 rArr f_(B)=422Hz`
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ALLEN -WAVES AND OSCILLATIONS-Part-1(Exercise-04)[A]
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