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A pipe open at the top end is held verti...

A pipe open at the top end is held vertically with some of its lower portion dipped in water. At a certain depth of immersion, the air column of length 3/8 m in the pipe resonates with a tuning fork of frequency 680 Hz. The speed of sound in air is 340 m/s. The pipe is now raised up by a distance 'X' until it resonates in the next overtone' with the same tuning fork. The value of 'X' is

A

20 cm

B

40 cm

C

50 cm

D

25 cm

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Verified by Experts

The correct Answer is:
D
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