Mensurationhard · Past Paper
The internal and external diameters of a hollow hemispherical vessel are 24 cm and 25 cm respectively. The cost to paint 1 cm² of the surface is Rs 0.05. Find the volume of material.
A962.5 cm³
B1200 cm³
C1050 cm³
D132.5π cm³
✓ Correct Answer: A — 962.5 cm³
Vol = 2/3 π (R³ - r³) = 2/3 * 22/7 * (12.5³ - 12³) ≈ 962.5 cm³.
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