![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Use 16 square paper with 1cm side length to make a rectangle and a square. How to make the perimeter of the figure shortest
16÷4=4
4*2=8
4*8=32
Two cuboids, 3cm long, 3cm wide and 1cm high, are used to form a large cuboid. What is the minimum surface area of the cuboid?
(3 × 3 + 3 × 1 + 3 × 1) × 2 × 2-3 × 1 × 2 = 54 square centimeter
(3 × 3 + 3 × 1 + 3 × 1) × 2 × 2-3 × 3 × 2 = 42 square centimeter, the smallest
Three cuboids, 3cm long, 2cm wide and 1cm high, are used to form a large cuboid with the smallest surface area. What is the surface area of this cuboid in square centimeter?
(3 × 2 + 3 × 3 + 2 × 3) × 2, = 21 × 2, = 42 (square centimeter); a: the surface area of this cuboid is 42 square centimeter
Three cuboids, 3cm long, 2cm wide and 1cm high, are used to form a large cuboid with the smallest surface area. What is the surface area of this cuboid in square centimeter?
(3 × 2 + 3 × 3 + 2 × 3) × 2, = 21 × 2, = 42 (square centimeter); a: the surface area of this cuboid is 42 square centimeter
RELATED INFORMATIONS
- 1. Three cuboids, 3cm long, 2cm wide and 1cm high, are used to form a large cuboid with the smallest surface area. What is the surface area of this cuboid in square centimeter?
- 2. The minimum surface area of the cube is () cm
- 3. The aspect ratio of the cuboid is 3:2:2, and its surface area is 168. In the surface area of the cuboid, several sides are square, and what is the area of the square
- 4. A cuboid with a square bottom is just a square after unfolding its side. The surface area of the cuboid is The surface area of a cuboid is () times that of a bottom area
- 5. Fold a 24 cm square paper in half four times to get a small square. What is the area of the small square______ Square centimeter
- 6. The perimeter of a square is 16 decimeters. If its side length is doubled, then its perimeter is 16 decimeters______ Decimeter, area is______ Square decimeter
- 7. The circumference of the bottom surface of a cylinder is 15.7 cm, and the side area is 62.8 square cm
- 8. There are two squares, one big and the other small, whose perimeter differs by 20 cm and area by 55 square cm. What is the area of a small square?
- 9. The perimeter of a square paper is 36 cm. How many small squares with an area of 1 square centimeter can fill this paper
- 10. What is the side length of a square with an area of 20 square centimeters? Answer with primary school knowledge
- 11. Use 20 squares with 1cm sides to form a rectangle. If the perimeter of the rectangle is the shortest, then one long side of the rectangle should be () cm
- 12. A cuboid is 3M long. After sawing it into three sections, the surface area increases by 36 square meters. The volume of the original cuboid is
- 13. After sawing a 3 m long cuboid into three sections, the surface area increases by 8 square decimeters. How many cubic decimeters is the original volume of this cuboid?
- 14. The surface area of the cuboid is reduced by () cm by sawing a 10 cm long, 8 cm wide and 8 cm high cuboid into the largest cube No direct answers,
- 15. A rectangular block of wood, 20 cm long, 15 cm wide and 8 cm high. Saw it into 4 pieces. How many square centimeters is the sum of the surface area of the four small rectangles?
- 16. A 4.2-decimeter-long cuboid is sawed into four sections on average, and the surface area is 150 square centimeters more than the original. How many cubic centimeters is the original volume of this section of wood
- 17. There is a cuboid with a square bottom, 20 cm high, and a square side. Find the volume of the cuboid
- 18. A cuboid with a square bottom and a square side length of 60 cm is obtained after the side is expanded, and the volume of the cuboid is calculated
- 19. Cut a part of a rectangular stone with a square bottom, a side length of 3DM and a height of 5DM, and process it into the largest cube as far as possible. Then, what is the volume of the stone chiseled?
- 20. The length, width and height of a cuboid are 8cm, 4cm and 3cm respectively. If it is used to saw the largest cube, its volume will be reduced by several percent