A company packages its milk powder in a cylindrical container whose base has a radius of $10.5 \mathrm{cm}$ and a height of $34 \mathrm{cm}$. The company places a label around the surface of the container. If the area of the label is $k {\mathrm{cm}}^2$, then find the value of $k$ considering $\mathrm{\pi }=\frac{22}{7}$.

The diameter of a cylinder is $14 cm$ and its height is $10 cm$, then find the curved surface of the cylinder.

A solid metallic sphere of radius $6 cm$ is melted and made into a solid cylinder of height $32 cm$. Find the curved surface area of the cylinder. (Take $\pi =3.1$)

 A cylindrical tank with hemisphere ends having radius $0.42 m$ and total height $3.84 m$. Find total surface area of the closed tank.