is beaten uniformly to from a disc of radius 2r. What will be the moment of inertia about the same axis ?

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A coin of mass m and radius r, having moment of inertia l about the axis passing through its centre and perpendicular to its plane, is beaten uniformly to from a disc of radius 2r. What will be the moment of inertia about the same axis ?
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Oct
A coin of mass m and radius r, having moment of inertia l about the axis passing through its centre and perpendicular to its plane, is beaten uniformly to from a disc of radius 2r. What will be the moment of inertia about the same axis ? A coin of mass m and radius r [...]
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