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Four similar point masses (each of mass ...

Four similar point masses (each of mass m) are placed on the circumference of a disc of mass M and radius R. The M.I. of the system about the normal axis through the centre O will be:

A

`MR^(2)+4mR^(2)`

B

`(1)/(2)MR^(2)+4mR^(2)`

C

`MR^(2)+(8)/(5)mR^(2)`

D

None of these

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The correct Answer is:
B
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