A spherical cannon ball, $28 \mathrm{cm}$ in diameter is melted and recast into a right circular conical mould, base of which is $35 \mathrm{cm}$ in diameter. Find the height of the cone.

A spherical ball of radius $3 \mathrm{cm}$ is melted and recast into three spherical balls. The radii of two of these balls are $1.5 \mathrm{cm}$ and $2 \mathrm{cm}$. Find the radius of third ball.

If the radius of third ball is $\mathrm{k} \mathrm{cm}$, then find $\mathrm{k}$ ?

A spherical shell of lead whose external and internal diameters are respectively $24 \mathrm{cm}$ and $18 \mathrm{cm}$, is melted and recast into a right circular cylinder $37 \mathrm{cm}$ high. Find the diameter of the base of the cylinder.

If the diameter of the base of the cylinder is $k \mathrm{cm}$ then find $k$?

A hemisphere of lead of radius $9 \mathrm{cm}$ is cast into a right circular cone of height $72 \mathrm{cm}$. Find the radius of the base of the cone.

If the radius of the base of the cone is $\mathrm{k} \mathrm{cm}$ then find $\mathrm{k}$ ?

The diameter of a sphere is $42 \mathrm{cm}$. It is melted and drawn into a cylindrical wire of diameter $2.8 \mathrm{cm}$. Find the length of the wire.

If the length of the wire is $k \mathrm{cm}$ then find $k$?

The diameter of a copper sphere is $18 \mathrm{cm}$. It is melted and drawn into a long wire of uniform cross section. If the length of the wire is $108 \mathrm{m}$, find its diameter.

If diameter is $k \mathrm{cm}$ then find $k$ ?