What is the area of the trademark paper in the right middle can? How much tin does it take to make such a can? (Keep square centimeter) Radius 10, Height 12.
The required trademark paper10× 3.14×12 = 376.8 (square centimeter) has a bottom radius of 10 ÷ 2 = 5 (centimeter) and a bottom area of 5× 5× 3./kloc-0.