Fifty-six tuning forks are arranged in order of increasing frequencies so that each fork gives 4 beats per second with the next one. The last fork gives the octave of the first. Find the frequency of

Question

Fifty-six tuning forks are arranged in order of increasing frequencies so that each fork gives 4 beats per second with the next one. The last fork gives the octave of the first. Find the frequency of the first. (answer in Hz ).

TestHub · Accepted Answer

There are 55 steps of 4 Hz, so f l a s t ​ = f 1 ​ + 220 . An octave means f l a s t ​ = 2 f 1 ​ , so f 1 ​ = 220 Hz.

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