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Two sitar wires A and B producing the n...

Two sitar wires A and B producing the note "Dha" are slightly out of tune and produce 5 beats per second. When the tension in the wire B is slighly increased, the beat frequency decreases to 3 Hz. If frequency of A is 512 Hz, what should be original and final frequency of B ?

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Original frequency of `B=507 Hz` and final frequency of `B =509 Hz`
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