Seven identical circular planar disks, each of mass M and radius R are welded symmetrically as shown. The moment of inertia of the arrangement about the axis normal to the plane and passing through the point P is :

Question

${{181} \over 2}M{R^2}$

${{55} \over 2}M{R^2}$

${{19} \over 2}M{R^2}$

${{73} \over 2}M{R^2}$

Solution

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