Question

How many spheres of diameter 12 cm each, can be made from a metallic cylinder of diameter 8 cm? The height of cylinder is 90 cm.
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Answer 1

hope this may help you

Answer 2

vol of cylinder = x * vol of sphere
pi r^2 h = x * 4/3 pi r^3
4^2 × 90 = x * 4/3 × 6×6×6
16 × 90 = x * 4×2×6×6
16×90
---------- = x
4×2×6×6
x = 5
5 spheres can be made out of this cylinder

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