In an air column , resonances occurs at 25cm and 77cm. If the frequency of the fork is 325 Hz, then the velocity of sound in air will be
A. 364 m/s
B. 357 m/s
C. 338 m/s
D. 346 m/s

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1 Answers

Correct Answer - C
`v=2n(l_2-l_1)=2xx325(0.77-0.25)`
`=3xx325xx0.52 = 338m//s`

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