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A solid sphere of mass 100 kg and radius...

A solid sphere of mass 100 kg and radius 10 m moving in a space becomes a circluar disc of radius 20 m in one hour.Then the rate of change of moment of inertia in the process is

A

`40/9 kg m^2 s^-1`

B

`10/9 kg m^2 s^-1`

C

`50/9 kg m^2 s^-1`

D

`25/9kg m^2 s^-1`

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