Finding the area of trademark paper is to find the lateral area of cylinder. The side of a cylinder is a rectangle, the length is the circumference of the bottom circle of the cylinder and the width is the height of the cylinder. Therefore,

Perimeter l = π d = 3.14 *11= 34.54cm.

Lateral area s = l * h = 34.54cm *15cm = 518.1cm?

Therefore, the area of trademark paper is about 5 18. 1 cm2.

(2) Solution: To find the aluminum skin area is to find the cylindrical lateral area, and to find the sheepskin area is to find the bottom areas of two cylinders. (The given width of 6dm should be the diameter, right? )

Aluminum S=2.6*π*6=48.984dm?

Sheepskin S=2*πd? /4=56.52dm？

(3) Solution: To find the iron sheet is to find the lateral area of the cylinder.

s = L *π* d = 2 * 3. 14 * 0. 15 = 0.942m？

I hope I can help you, and I hope the landlord will adopt it!