Seven identical circular planar discs, each of mass 
and radius 
are welded symmetrically as shown in the figure. The moment of inertia of the arrangement about the axis normal to the plane and passing through the point 
is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Moment of inertia of an outer disc about the axis through center
For 6 such discs,
Moment of inertia 
So, moment of inertia of system
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