The thickness of a metal pipe is $1 \mathrm{cm}$. Its inner diameter is $14 \mathrm{cm}$. What is the volume of metal needed for a pipe of length $1 \mathrm{m}$? (Use$\mathrm{\pi }= 3.14$)

If the lateral surface of a cylinder of height $5 \mathrm{cm}$ is $94.2 {\mathrm{cm}}^2$, then find the radius of the base.

If the lateral surfaee of a cylinder of height$5 \mathrm{cm}$ is $94.2 {\mathrm{cm}}^2$, then find the volume of the cylinder(Use $\mathrm{\pi }=3.14$)