Two Organ Pipes, Open at Both Ends, Are Meant to Be

Two organ pipes, open at both ends, are meant to be the same length, but apparently they are not. When played simultaneously the beat frequency heard is 2.4 Hz. If the fundamental frequency of the first pipe is 228 Hz, by what fraction is the first pipe different in length than the second?

A) 2%
B) −2%
C) −1%
D) Not enough information
E) 1%

Correct Answer:

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