Question:
12 spheres of the same size are made from melting a solid cylinder of 16 cm diameter and 2 cm height. The diameter of each sphere is
(a) $\sqrt{3} \mathrm{~cm}$
(b) 2 cm
(c) 3 cm
(d) 4 cm
Solution:
The volume of solid cylinder = 12 × volume of one sphere
$r=2 \mathrm{~cm}$
The required diameter d = 2 × 2 = 4 cm
Hence, the correct answer is choice (d).
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