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Fifty-six tuning forks are arranged in o...

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.

A

110 Hz

B

220 Hz

C

320 Hz

D

420 Hz

Text Solution

Verified by Experts

The correct Answer is:
B
`N = (n_(L) - n_(f))/(x) + 1`
`56 -1 = (2n_(f) - n_(f))/(4)`
`55 = (n_(f))/(4)`
`n_(f) = 220 Hz`
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