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A tuning fork is used to produce resonan...

A tuning fork is used to produce resonance in glass tuve. The length of the air column in the tube can be adjusted by a variable piston. At room temperature of `27^@C` two succesive resonance are produced at 20 cm and 73 cm column length. If the frequency of the tuning fork is 320 Hz. the velocity of sound is air at `27^(@)C` is

A

330m/s

B

339m/s

C

350m/s

D

300m/s

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The correct Answer is:
B
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