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Calculate M.I. of a thin uniform ring ab...

Calculate M.I. of a thin uniform ring about an axis tangent to the ring and in a plane of the ring, if its M.I. about an axis passing through the centre and perpendicular to plane is 4 kgm2
A. `3 kgm^2`
B. `6 kgm^2`
C. `9 kgm^2`
D. `12 kgm^2`

A

`12 kg m^2`

B

`3 kg m^2`

C

`6 kg m^2`

D

`9 kg m^2`

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