Question

12 spheres of same size are made from melting a solid cylinder of 16 cm diameter and 2 cm height the diameter of each sphere is?​

Answer 1

Answer:

volume during conversation always remain same.

volume of the sphere is 4/3 pie r3

Answer 2

Answer:

$volume \: of \: the \: sphere \: = \frac{4}{3} \pi {r}^{3} \\ volume \: of \: cylinder \: = \pi {r}^{2} h \\ volume \: of \: cylinder = 12 \times volume of \: the \: sphere \: \\ \pi {r}^{2} h \: = 12 \times \frac{4}{3} \pi {r}^{3} \\ {r}^{2} h = 16 {r}^{3} \\ {8}^{2} \times 2 = 16 \times {r}^{3} \\ \frac{128}{16} = {r}^{3} \\ 8 = {r}^{3} \\ therefore \: r = \sqrt[3]{8} \\ r = 2 \: cm \: \\ diameter = 2 + 2 = 4cm$