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A coin of mass m and radius r having moment of inertia I about the axis passes

A coin of mass m and radius r having moment of inertia I about the axis passes through its centre and perpendicular to its plane. It is beaten uniformly to form a disc of radius 2r. What will be the moment of inertia about the same axis?

Options

(a) I
(b) 2I
(c) 4I
(d) 16I

Correct Answer:

4I

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

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