A hollow sphere of internal and external radii 2 cm and 4 cm respectively is melted into a cone of base radius 4 cm. Find the height and ***** height of the cone.
Given that
Hollow sphere external radii = 4 cm = r2
Internal radii (r1) = 2 cm
Cone base radius (R) = 4 cm
Height = ?
Volume of cone = Volume of sphere
