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A pendulum is hung from the roof of a su...

A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 `m//s^(2)` at a distance of 5 m from the mean position. The time period of oscillation is

A

2 s

B

`pi`s

C

2 `pi`s

D

1 s

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