2. A 96-cm-long iron wire surrounds a cube, and the side length of this cube is () cm.
3. The sum of the sides of a cuboid is 80 cm, the length is 10 cm, the width is 7 cm and the height is () cm.
4. To make a rectangular frame with a bottom circumference of 18 cm and a height of 3 cm, at least () cm of iron wire is needed.
5. When the length, width and height of a cuboid are expanded twice, its surface area will be ().
6. A cuboid can have at most () square sides and at most () equal-length sides.
7. At least () small cubes are needed to form a big cube. If the side length of a small cube is 5 cm, then the surface area of a large cube is () cm 2 and the volume is () cm 3.
8. Put three cubes with a side length of 4 cm into a cuboid, the surface area is reduced by () square centimeters, and its volume is () cubic centimeters.
9. The bottom area of a cube is 25 square decimeter, the surface area is () square decimeter and the volume is () cubic decimeter.
10. Saw a cuboid with a length of 124 cm, a width of 10 cm and a height of 10 cm into the largest cube, and at most it can be sawed into ().
Second, the application problem.
1, a cube with an area of 36 square meters, how many centimeters is the sum of all its sides?
2. A rectangular frame with a length of 10 cm and a width of 7 cm, welded with iron wire, should be several centimeters high.
3. The daily swimming pool is 25m long,10m wide and1.6m deep. Tiles are built around the swimming pool and at the bottom. If the side length of tiles is 1 decimeter square, how many tiles do you need at least?
4. Can you cut a cube with a side length of 12 cm into several cubes with a side length of 3 cm?
5. Rectangular carton with length 10 cm, width 6 cm and height 5 cm. There are 2 10 pieces of 2 square meters of cardboard. How many cartons can be made like this (not including the interface)?
6. The side length of a cuboid is 72 cm, the length is 9 cm and the width is 6 cm. How many square centimeters is its surface area?
7. How many cubic meters of wood does it take to lay a 2 cm thick wooden floor on the floor of a rectangular living room with a length of 10 m and a width of 3.5 m? Paint the floor after paving the road. What is the paint area?
Thinking about the problem:
Put 12 cubes 2 cm long into a cuboid. What is the surface area of a cuboid? There are several different answers.