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A tuning fork of frequency x produces 4 beats with a source of 256 Hz and 8 beats

A tuning fork of frequency x produces 4 beats with a source of 256 Hz and 8 beats with another source of 268 Hz. Then x equals to

Options

(a) 256 Hz
(b) 260 Hz
(c) 264 Hz
(d) 268 Hz

Correct Answer:

260 Hz

Explanation:

Frequency of tuning fork be x.
.·. x = 256 ± 4 = 260 or 252 Hz.
x = 268 ± 8 = 276 Hz or 260 Hz
.·. x =260 Hz.

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