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Two tuning forks A and B produce notes of frequencies 250 Hz and 260 Hz respectively. When an unknown note is sounded with A it produces x beats/sec. But when the same note is sounded with B, the number of beats produced per second becomes 4x. The unknown frequency could be

A

250 Hz

B

252 Hz

C

245 Hz

D

270 Hz

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The correct Answer is:
B
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