Question

A cube of side 4cm and a cylinder 7 cm radius and height 9cm are melted together to form a sphere find the surface area of the sphere thus formed

Answer 1

Vol. Of sphere = vol. Of cube +cylinder
=64 + 1386
=1450

$\pi \: {r}^{3}$
=1450

r =
$\sqrt[3]{461.36}$