Find the height of the given cylinder (2 decimal places)

(T.S.A = Total Surface Area)

This cylindrical box is to be covered. Find the area of the material needed if 20% extra is allowed for seams and overlaps. Note: The top and bottom do not need to be covered. (2 decimal places)

This roller covers \(188400~\text{m}^2\) in \(\text{10000}\) revolutions. Find the length \({\rm{(}}L{\rm{)}}\) of roller. (1 decimal place)

Claire wants to make several cans like the one below. She is going to cut them from a sheet of metal that has an area of \(5428.80~\text{cm}^2\). Allowing 20% wastage, how many cans can she make?

Find the exact surface area of a hollow cylinder (no ends) with a radius of \(3 \text{ cm}\) and a height of \(8 \text{ cm}\)

Find the exact surface area of an open cylinder can (one end) with a radius of \(2 \text{ cm}\) and a height of \(10 \text{ cm}\)

Find the exact surface area of a solid cylinder (two ends included) with a radius of \(4 \text{ cm}\) and a height of \(6\text{ cm}\)

A hollow cylinder (no ends) has a surface area of \(30 \pi \text{ cm}^2\). Its radius is \(3 \text{ cm}\), find its height. 

An open cylindrical can (one end) has a surface area of \(20 \pi \text{ cm}^2\). Given that its height is \(4 \text{ cm}\), find its radius.