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A circular disc is to be made by using i...

A circular disc is to be made by using iron and aluminium, so that it acquires maximum moment of inertia about its 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

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The correct Answer is:
A
Density of iron is more than Aluminium
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