Unfold the side of a cuboid box with a square bottom, which is a square with a side length of 12 decimeters. How many square decimeters of hard paper do you need to make this covered box

Unfold the side of a cuboid box with a square bottom, which is a square with a side length of 12 decimeters. How many square decimeters of hard paper do you need to make this covered box

Bottom length = 12 △ 4 = 3 decimeters
Cardboard = 3 × 3 × 2 + 12 × 12 = 162 square decimeters

If you unfold the side of a rectangular box with a square bottom, you will get a square with a side length of 8 decimeters. Then the surface area of the box is () cubic centimeter

The title should be () square centimeter
Answer: 7200
Formula: the side length of the bottom is 8 △ 4 = 2 decimeters,
The surface area is 8 × 8 + 2 × 2 × 2 = 72 square decimeters = 7200 square centimeters

If you unfold the side of a rectangular box with a square bottom, you will get a square with a side length of 8 decimeters?
Q: what's the volume of this cuboid carton?

The side of any cuboid is a rectangle with its bottom circumference as the length and height as the width. The bottom of the cuboid carton in this question is a square, and the side is a square with a side length of 8 decimeters. Therefore, the side length and height of the cuboid carton are 2 decimeters and 8 decimeters respectively, so its volume is 2 × 2 × 8 = 32 cubic decimeters