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The adjoining figure shows a disc of mass M and radius R lying in the X-Y plane with its centre on X-axis at a distance α from the origin. Then the moment of inertia of the disc about the X-axis is

(a)  M(R2/2)

(b) M(R2/4)

(c)  M(R2/4+a2)

(d) M(R2/2+a2)

Ans.b

(39)

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