A cuboid is 20cm in length, 12cm in width and 6cm in height. After it is divided into two cuboids, what is the minimum and maximum increase in surface area?

A cuboid is 20cm in length, 12cm in width and 6cm in height. After it is divided into two cuboids, what is the minimum and maximum increase in surface area?

The area of the three sides is 240cm, 72cm and 120cm respectively
After segmentation, the surface area may increase by 480cm & # 178; or 144cm & # 178; or 240cm & # 178;, up to 480cm & # 178

A piece of 33.12cm long rectangular material paper is made into a cylindrical teaching aid by using the shadow part in the figure to calculate the surface area and volume

A piece of rectangular material paper with a length of 33.12cm is made into a cylindrical teaching aid by using the shadow part in the figure to calculate the surface area and volume diameter 33.12 ÷ (3.14 + 1) = 33.12 △ 4.14 = 8cm, height 8 × 2 = 16cm, surface area 3.14 × 8 / 2 × 2 + 3.14 × 8 × 16 = 3.14 × 32 + 3.14 × 128

For a cone, its bottom diameter is 8cm, its height is 12cm, and its volume is calculated. For a cone, its bottom area is 9m, and its height is 3.6m
On the threshing ground, there is a wheat field which is similar to a cone. The weight of wheat per cubic meter is about 735 kg. How many kg are there for wheat
Note: 8M
Bottom diameter: 5m
2. A cylindrical steel with a bottom diameter of 8 decimeters and a height of 6 decimeters is melted into a cone with a bottom diameter of 12 decimeters. What is the height of the cone?
3. For a grain store, the lower part is a cylinder, and the upper part is a cone. The diameter of the bottom is 18 meters, the height of the lower part is 4 meters, and the height of the upper part is 3 meters
It's a wonderful new year Forget all the knowledge

4x4x3.14x12x1/3 = 200.96 cm3
9x3.6x1/3 = 10.8m3
one
1 / 3x2.5x2.5x3.14x1.8x735 = 6854.6kg
two
4x4x6 ÷ (6x6x1 / 3) = 8 decimeters
three
9x9x3.14x4 + 9x9x3.14x/13 = 339.12m3