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Eight metallic spheres of radius 1 cm are melted to form one sphere. The radius of the resulting sphere is:
Given,
8 metallic sphere of 1 cm is melted to form a big sphere
Let the radius of big sphere = R
Volume of sphere = $$\frac{4}{3}\times\ \pi\ \times\ r^3$$
According to question,
$$8\times\ \frac{4}{3}\times\ \pi\ \times\ r^3=\frac{4}{3}\times\ \pi\ \times\ R^3$$
$$8\times\ 1^3=\ \ R^3$$
R = 2 cm
Hence, Option A is correct.
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