A circular disc is to be made by using iron and aluminium so that it acquired maximum moment of inertia about geometrical axis. It is possible with

(a) aluminium at interior and iron surround to it
(b) iron at interior and aluminium surround to it
(c) using iron and aluminium layers in alternate order
(d) sheet of iron is used at both external surface and aluminium sheet as internal layers
Correct option: (a) aluminium at interior and iron surround to it
A circular disc is to be made by using iron and aluminium so that it acquired maximum moment of inertia about geometrical axis. It is possible with aluminium at interior and iron surround to it.

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