The shape of a paper bag after opening is rectangular, 55 cm long, 8 cm wide, 40 cm high, surface area, complete!

The shape of a paper bag after opening is rectangular, 55 cm long, 8 cm wide, 40 cm high, surface area, complete!

The process is right, but the third number should be 55, and the calculation is wrong, it should be 5480

Divide a square with an edge length of 5cm into two rectangles of equal size. What is the surface area of this rectangle

The area of the bottom of the cube is 5 * 5 = 25 square centimeters
The cube has six bottoms with the same area. After it is divided into two rectangles with the same size, the surface area increases by two bottoms
The sum of the surface areas of two cuboids is equal to the sum of the bottom areas of 6 + 2 = 8 cuboids, which is 25 * 8 = 200 square centimeters
The surface area of each cuboid is 200 / 2 = 100 square centimeters

How many centimeters is the sum of the edges of the cuboid? What's the surface area in square centimeters?

The length of the assembled cuboid is: 8 × 3 = 24 (CM), the width and height are 8 cm, the sum of edge length: (24 + 8 + 8) × 4 = 160 (CM); surface area: 8 × 8 × 6 × 3-8 × 8 × 4 = 1152-256 = 896 (square cm); answer: the sum of edge length of the cuboid is 160 cm, the surface area is 896 square cm