1.

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

Answer»

ALUMINIUM at interior and iron surround to it
iron at interior and aluminium surround to it
using iron and aluminiuml LAYERS in ALTERNATE order
sheet of iron is used at both EXTERNAL surfaces and aluminium sheet as internal layers.

Answer :A


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