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Two tuning forks, A and B, produce notes...

Two tuning forks, A and B, produce notes of frequencies 258 Hz and 262 Hz. An unknown note sounded with A produces certain beats. When the same note is sounded with B, the beat frequency gets doubled. The unknown frequency is

A

268 Hz

B

260 Hz

C

250 hz

D

242 Hz

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The correct Answer is:
C
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