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Physics · Moment of Inertia

The moment of inertia of a hollow circular section, having external diameter D and internal diameter d, about its centroidal X-axis is given by:

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Updated: October 2026

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1π16(D2 − d2)
2π16(D3 − d3)
3π32(D4 − d4)
4π64(D4 − d4)✓

Correct answer

π64(D4 − d4)

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The moment of inertia of a hollow circular section, having external diameter D and internal diameter d, about its centroidal X-axis is given by:

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