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A tuning fork and an air column whose te...

A tuning fork and an air column whose temperature is ` 51^(@)C` produce 4 beats in one second, when sounded together . When the temperature of air column decreases . When the temperature remain `16^(@)C` only one beat per second is produced. The frequency of the tuning fork is

A

100 Hz

B

75 Hz

C

150 Hz

D

50 Hz

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The correct Answer is:
D
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