Mensurationhard · Past Paper
A metal cylinder of radius 4 cm and height 10 cm is melted to form spheres of radius 2 cm each. How many spheres can be made?
A15
B30
C60
D45
✓ Correct Answer: A — 15
Vol_cyl = π*4*4*10 = 160π. Vol_sph = (4/3)π*2^3 = 32π/3. Number = 160π / (32π/3) = (160 * 3) / 32 = 15.
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