The correct option is (B):Internal and External radius of sphere are 2 cm and 4 cm radius of cone = 4 cm. Let height of cone =\(h\) cm Volume of hollow sphere = Volume of cone \(\frac{4}{3} \pi [( r1)^{3} - (r2)^{3}]=\frac{1}{3} \pi R^{2}h\) \(4[(4)^{3} - (2)^{3}]=4^{2}h \) \(h = 14cm\)