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A cube with an edge length of 1 decimeter is cut three times as shown in the figure and divided into six cuboids of different sizes. The sum of the surface areas of the six cuboids is______ ．
1 × 1 × (6 + 6) = 12 (square decimeter); answer: the sum of the surface area of the six cuboids is 12 square decimeter; so the answer is: 12 square decimeter
A cube with an edge length of 1 decimeter is cut three times as shown in the figure and divided into six cuboids of different sizes. The sum of the surface areas of the six cuboids is______ ．
1 × 1 × (6 + 6) = 12 (square decimeter); answer: the sum of the surface area of the six cuboids is 12 square decimeter; so the answer is: 12 square decimeter
The edge of a cube is 3 decimeters long. If you cut it into two identical cuboids, what is the surface area of each cuboid?
The edge length is a cube of 3 decimeters. If you cut it into two identical cuboids, you need to increase the surface area of two squares of 3 decimeters
The original surface area of the cube is 3 × 3 × 6 = 54 square decimeters
The total surface area of the two cuboids is 54 + 3 × 3 × 2 = 72 square decimeters
The surface area of each cuboid is 72 △ 2 = 36 square decimeters
RELATED INFORMATIONS
- 1. A cube with 2 mm edge length is cut into two cuboids with equal volume. The surface area of one cuboid is 1______ dm2．
- 2. A cuboid outer packing carton is 0.8 meters long, 0.4 meters wide and 0.15 meters high. How many square meters of cardboard should be used to make the carton
- 3. Use 240 cm iron wire to make a largest cube frame, and then use cardboard to make 6 pieces of bread. At least how many square centimeters of cardboard? What is the volume of the carton in cubic centimeter?
- 4. Use 240 cm iron wire to make a largest cube frame, and then use cardboard to make 6 pieces of bread. At least how many square centimeters of cardboard? What is the volume of the carton in cubic centimeter?
- 5. The shape of the packing box of a refrigerator is a cuboid without bottom surface, which is 14 decimeters long and 6 decimeters wide. It takes at least more time to make the packing box Less square decimeter cardboard?
- 6. A cuboid packing box, measured from the inside, with a side length of 0.8 m square at the bottom, 5 m. what is the volume of this packing box/
- 7. A worker nailed a rectangular mail box with a thin board, and the Nylon Braided strips were reinforced in three directions as shown in the figure. The Nylon Braided strips were 365 cm, 405 cm and 485 cm respectively. If the joint overlap of each nylon strip was 5 cm, how many cubic meters is the volume of this rectangular box?
- 8. In a metal smelter, 27 square ingots of the same size were melted in the furnace and then fired into a rectangular ingot. The length, width and height of the rectangular ingot were measured to be 160cm, 80cm and 40cm respectively. What was the original edge length of the square ingot?
- 9. In a metal smelter, 27 square ingots of the same size were melted in the furnace and then fired into a rectangular ingot. The length, width and height of the rectangular ingot were measured to be 160cm, 80cm and 40cm respectively. What was the original edge length of the square ingot?
- 10. The length, width and height of a cuboid are three continuous natural numbers, and its volume is 3360 cubic centimeter
- 11. The cuboid water tank with length, width and height of 50cm, 30cm and 60cm respectively is equipped with two water inlet pipes a and B. pipe a is opened first, and then the two pipes are opened together after a period of time 1. How many minutes later, tubes a and B will open at the same time? What's the depth of water? 2. How many milliliters of water can be injected into AB and ab pipes at the same time?
- 12. The cuboid water tank with the length, width and height of 50cm, 40cm and 60cm respectively is equipped with two upper water inlet pipes a and B. first open pipe a separately, and then open pipe B after a period of time The two pipes feed water together, and the broken line statistical chart below shows the water inflow situation 60 25 thirty fifteen 0 10 20 30 time (seconds) This is a broken line chart. I didn't draw a line. There should be a connecting line between 15 and 25 (1) After () minutes, both pipes a and B enter water at the same time, and the water depth is () cm (2) A, B two water at the same time, water () ml per minute
- 13. A cuboid wooden box is 60cm long, 50cm wide and 40cm high. This wooden box covers an area of () square centimeters
- 14. A cylindrical medicine bottle with an inner diameter of 8 cm and a liquid medicine depth of 10 cm is exactly three fifths of the bottle's capacity. How many cubic centimeters is the volume of a spherical medicine bottle?
- 15. The inner diameter of a cylindrical oil barrel is 40cm and its height is 50cm. If the volume of 1l can hold 0.85kg diesel oil, how many kg diesel oil can the barrel hold? Formula
- 16. A cylindrical oil barrel with a bottom diameter of 40cm and a height of 60cm
- 17. The surface of 100 oil drums should be painted with antirust paint, which is 0.6kg per square meter. The diameter of the bottom surface of each oil drum is 40cm, and the height is 60. How many kg of paint are needed to brush these oil drums?
- 18. The bottom area of a truck carriage is 408 square meters. It is used to transport a kind of rectangular packing box. The edge length of the packing box is 0.6 m, 0.4 m and 0.5 m respectively. If two boxes are put in it How many packing boxes can this truck hold at most? It's connected
- 19. The factory has produced a batch of cuboid packing cases, which are 0.6 meters long, 0.4 meters wide and 0.5 meters high. They need to be pulled away by a truck. The bottom of the truck case The product is 7.2 square meters, and can only be packed in 2 layers. How many packing boxes can be packed at most
- 20. The cylindrical wood with a diameter of 40 cm and a height of 100 cm on the bottom is cut into four equal parts according to the "+" shape on the bottom. What is the surface area of each part?