M.I. of a thin ring (external diameter D, internal diameter d) about an axis per

Question

M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is

Options:

A . π/64 (D⁴ + d⁴)

B . π/32 (D⁴ - d⁴)

C . π/32 (D⁴ + d⁴)

D . π/32 (D⁴ × d⁴)

Answer: Option B

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