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In a certain unit, the radius of gyratio...

In a certain unit, the radius of gyration of a uniform disc about its central and transverse axis is `sqrt(2.5)`. Its radius of gyration about a tangent in its plane (in the same unit) must be

A

`sqrt5`

B

2.5

C

`2sqrt(2.5)`

D

`sqrt(12.5)`

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