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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

iron and aluminium layers in alternate order

B

aluminium at interior and iron surrounding ir

C

iron at interior and aluminium surrounding it

D

either 'a' or 'c'

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The correct Answer is:
B
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