A cuboidal tin box opened at the top has dimensions $20 \mathrm{cm}\times 16 \mathrm{cm}\times 14 \mathrm{cm}$. What is the total area of metal sheet required to make $10$ such boxes? Write the answer in ${\mathrm{cm}}^2$.

Find the area to be painted in the following block with a cylindrical hole. Given that length is $15 \mathrm{cm}$, width $12 \mathrm{cm}$, height $20 \mathrm{cm}$ and radius of the hole $2.8 \mathrm{cm}$. Write the answer in ${\mathrm{cm}}^2$.