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A circular disc X of radius R is made from an iron plate of thickness t and another disc

A circular disc X of radius R is made from an iron plate of thickness t and another disc Y of radius 4R is made from an iron plate of thickness t/4. Then the relation between the moments of inertia Ix and Iʏ is

Options

(a) Iʏ = 64 Ix
(b) Iʏ = 32 Ix
(c) Iʏ = 16 Ix
(d) Iʏ = Ix

Correct Answer:

Iʏ = 64 Ix

Explanation:

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