How many square decimeters of cardboard should be used to make a cube carton with an edge length of

1.If you make a cube carton without a lid, take a square cardboard, cut four 3 cm squares at each of the four corners to form five squares with a side length of 3 cm, and the four squares on the four sides stand up to be a cube without a lid, and the cardboard area is 9 98 = 81 square centimeters.

2.If you want to make a piece with a lid, take a rectangular piece of cardboard, one side is 9 cm, one side is 12 cm, cut a square with a side length of 3 cm on one side, and a rectangle with a side length of 3 6 cm on the opposite side, to get four squares with a side length of 3 cm and a rectangle with a side length of 3 6 cm. Fence them all around.

Fold the rectangular one again and you'll see the lid. The area is 9 12 = 108 square centimeters.

This kind of problem is equivalent to finding the surface area of this cube, according to the formula: 3*3*6=54 (square decimeters), so at least 54 square meters of cardboard should be used.

Hello: 3x3x6=54 square decimeters are required.

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I don't understand very well, but theoretically: each surface is an area of 3 3, if it is not capped, it is 5 faces, 45 square decimeters; If it is capped, it is 6 sides, 54 square decimeters. If it is assembled, the thickness of the board should also be considered. Hope it helps!

At least 54 square decimeters of cardboard are used to dig lead.

The analysis process is as follows:

Because the cube has 6 identical faces, the area of each face is 3 decimeters, 3 decimeters, 9 square decimeters.

To make a cube carton with an edge length of 3 decimeters, use at least 6 9 54 square decimeters of cardboard.

That is, find the surface area of the cube s=6a=6*3 3=54 square decimeters.

Ridge length 3 dm The carton (with lid) has 6 sides.

The area of each polygon is 3 3 = 9 square decimeters.

6 polygons require 9 6 = 54 square decimeters.

The question requirement is square meters, and the remainder of the ruler is so, so it is converted to 54 square decimeters = square meters.

A: Vertical height: at least square meters of cardboard are required.

If there is no lid, it is 5 faces, and the area is Bi Min 9 5 = 45 square decimeters = square meters.

At least square meters of cardboard are required.

Solution: Cube surface area = edge, long edge, and 6

1 acre of finch reed 2 1 2 6

3 2 (square with decimeters).

A: 3 2 square decimeters of paper are required.

1 2 1 2 5 = square decimeters).

A: At least paper square decimeters are required.

4 4 (6-1) = 80 square decimeters.

A: At least 80 square decimeters of cardboard are required.

How much cardboard do you want to use?

square meters) What is the volume of the carton?

cubic meters) are swimming freely.

To use cardboard area = square meters).

The volume of the carton penny beat lead silver qing = cubic meters of Bihao).

Hello! Because the cube has 6 identical faces, and the area of each face is 3 dm x 3 dm 9 square dm, to make a 3 dm cube carton, at least 6x9 54 square decim cardboard should be used.