Weight of a solid metal sphere of radius 4 cm is 4 kg the weight of a hollow sphere made with same metal whose outer diameter is 16 cm and inner diameter is 12 cm is
Volume of solid sphere with radius 4 cm is,
= $$\frac{4}{3} \pi (4)^{3} cm^{3}$$
Volume of hollow sphere with outer diameter 16 (r = 8) and inner diameter 12 (r = 6) is,
= $$\frac{4}{3} \pi (8^{3} - 6^{3}) cm^{3}$$
=Â $$\frac{4(512 - 216)}{4^{3}}$$
=Â $$\frac{296}{4^{2}}$$
= $$18.5$$
Hence, option D is the correct answer.
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