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If the length of a simple pendulum is eq...

If the length of a simple pendulum is equal to the radius of the earth, its time period will be

A

`T= pi sqrt((R ) /(g))`

B

`T= 2pi sqrt((2R)/(g))`

C

`T= 2pi sqrt((R )/(g))`

D

`T= 2pi sqrt((R )/(2g))`

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