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The first obertone of an open organ pipe...

The first obertone of an open organ pipe beats with the first overtone of a closed organ pipe with a beat frequency of 2.2 Hz. The fudamental frequency of clos3ed organ pipe is 110 Hz. Find length of the open pipe. (Given, sound in air =330 m/s )

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The correct Answer is:
`l_1`=0.993 m or 1.006 m
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