The ratio of the radii of gyration of a ...

The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius about a tangential axis in the plane of the ring is:-

A

`2:1`

B

`sqrt(5):sqrt(6)`

C

`2:3`

D

`1:sqrt(2)`

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The correct Answer is:

2

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