Take the rectangular paper of 26cm wide and 18cm, cut a square with side length of 4cm from each corner, and fold it into a cuboid paper box without cover. What's the capacity of this paper box?

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• 1. Fold a 26 cm wide 18 cm rectangular paper into four corners, cut out a rectangle with a side length of 4 cm, and then make a rectangular paper box without cover. What is the volume of this paper box?
• 2. As shown in the figure, it is a cuboid of 12cm, 9cm and 20cm in length, width and height. Calculate the area of rectangle BB ` d ` D
• 3. Xiao Hong uses a piece of rectangular paper with a length of 12cm and a width of 8cm to cut it into the largest triangle (as shown in the figure). What is the area of the paper (shadow part) cut off?
• 4. The bottom area of a cone is 20 cm, the height is 12 cm and the volume is 10 cm________ . 2. The bottom radius of a cone is 2 mm, the height is 6 DM, and the volume is. 3. The diameter of the bottom of a cone is 6cm, the height is 4cm, and the volume is. 4. The radius of the bottom of a cylinder is 10cm and the volume is. The volume of a cone equal to its base and height is. 5. The circumference of the bottom surface of a cone is 6.28m, 5m, and the volume is. The volume of a cylinder with the same base and height is.
• 5. A rectangle paper of 20cm in length and 12cm in width is used to form a cylinder. The maximum side area of the cylinder is () CM & # 178;
• 6. As shown in the figure, the length of the rectangle is 12cm, the width is 5cm, the area of the triangle is 24cm2, what is the area of the shadow part
• 7. As shown in the figure, a chopstick with a length of 24cm is placed in a cylindrical water cup with a diameter of 5cm at the bottom and a height of 12cm. If the length of the chopstick exposed on the outside is HCM, the value range of H is () A. 0＜h≤11B. 11≤h≤12C. h≥12D. 0＜h≤12
• 8. A brick is 24cm long, 12cm wide and 5cm thick. If the brick is placed on the ground to make it most stable, what is the floor area of the brick
• 9. When the length of a rectangle is reduced by 5cm and the width is increased by 12cm, it becomes a rectangle, and the perimeter of the rectangle is 100cm less than twice the perimeter of the original rectangle Calculate the length and width of the original rectangle (unit: cm)
• 10. A brick is 24cm in length, 12cm in width and 5cm in height. What's its volume? How many bricks are there in a cube
• 11. A rectangular piece of paper, 20 cm in length and 18 cm in width, is folded into a carton by subtracting two cm squares from each of its four corners Formula!
• 12. A 60 cm wide 20 cm rectangle, cut a 5 cm square from each corner, and then fold it into a paper box What's the surface area of your car in square centimeter?
• 13. A 30 cm long, 20 cm wide rectangular cardboard, four corners of each cut side length is 5 cm square, just folded into a carton without cover, What's the volume of this carton?
• 14. When the side length of a square is increased by 6 cm, its area is increased by 96 square cm. What is the area of the original square
• 15. When the side length of a square increases by 6 cm, its area increases by 96 square cm. What is its original area
• 16. Application: a square, after the side length increases 6 cm, the area increases 132 square cm, how much is the original side length of the square
• 17. The side length of a square is 6 cm thick, and the area is increased by 132 square centimeters. What is the original side length? The side length of a square is increased by 6cm
• 18. When the side length of a square increases by 6 cm, its area increases by 132 square cm?
• 19. When the side length of a square increases by 6cm, its area increases by 96cm. What is its original area?
• 20. When the side length of a square is increased by 6 cm, its area is increased by 96 square cm. What is the area of the original square?