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A hollow sphere of simple pendulum is fi...

A hollow sphere of simple pendulum is first filled with mercury and then with water . The time periods are in the ratio if their densities are in the ratio `13.6:1`

A

`1:1`

B

`1:sqrt(13.6)`

C

`1:13.6`

D

`13.6:1`

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The correct Answer is:
A
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