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A massless rod is suspended by two ident...

A massless rod is suspended by two identical strings AB and CD of equal length. A block of mass m is suspended from point O such that BO is equal to ‘x’. Further, it is observed that the frequency of `1^st` harmonic (fundamental frequency) in AB is equal to `2^nd` harmonic frequency in CD. Then, length of BO is

A

`L/5`

B

`L/4`

C

`(4L)/5`

D

`(3L)/4`

Text Solution

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The correct Answer is:
A
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