Hello!

1. Paste a layer of paper on the outside of a rectangular frame with a length and width of decimeters and a height of decimeters. To find its {surface area}, put labels around the carton. That is to find {the side area of ??the cuboid}

2,

There is a cylindrical iron box with a bottom radius of 2 decimeters and a height of 5 decimeters. How many square decimeters of paper are needed to place a circle of trademark paper along the side of the tin box?

The circumference of the bottom is

2×2×3.14=12.56 (decimeters)

Paper required

12.56×5=62.8 (square decimeter)

Hope this can help you