Question
The number of solid spheres, each of diameter 8cm, that
could be molded to form a solid metal cylinder of height 64cm and diameter 4cm is:Solution
Diameter of sphere =8cm then radius =4cm. Height of cylinder =90cm and radius =4/2=2cm. Let the number of solid spheres=n ATQ- Volume of cylinder =n× volume of Sphere πr2h = n ×4/3 πr3 2×2×64 =n×4/3 ×4×4×4 n=3
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