Mensurationhard · Past Paper
A metallic sphere of radius 10.5 cm is melted and then recast into small cones, each of radius 3.5 cm and height 3 cm. Find the number of cones.
A126
B100
C252
D63
✓ Correct Answer: A — 126
Vol_sphere = 4/3 π (10.5)³. Vol_cone = 1/3 π (3.5)² * 3. Ratio = (4 * 10.5 * 10.5 * 10.5) / (3.5 * 3.5 * 3) = 126.
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