# A ring and a thin hollow cylinder have the same mass and radius. If I_(r ) and I_(s) represent their moment of inertia about their axes, then

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A ring and a thin hollow cylinder have the same mass and radius. If I_(r ) and I_(s) represent their moment of inertia about their axes, then
A. I_(r )=2I_(s)
B. I_(s)=2I_(r )
C. I_(s)=I_(r )
D. none of these

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As mass and radius of ring = mass and radius of hollow cylinder.