Pianos Are Usually Strung with Multiple Identical Wires Sounding Each

Pianos are usually strung with multiple identical wires sounding each note. If two wires that are each meant to have a fundamental frequency of 283.5 Hz are played, and a beat frequency of 1.5 Hz is heard, by what fraction must the string which is lower in frequency than the other have its tension adjusted?

A) 0.27%
B) 0.53%
C) Not enough information
D) 1.1%

Correct Answer:

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