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?

1100 square centimeter (60 * 20-5 * 5 * 4 = 1100)

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1. 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!
2. 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?
3. 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?
4. 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
5. 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?
6. 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.
7. 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;
8. 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
9. 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
10. 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
11. 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?
12. 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
13. When the side length of a square increases by 6 cm, its area increases by 96 square cm. What is its original area
14. 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
15. 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
16. When the side length of a square increases by 6 cm, its area increases by 132 square cm?
17. When the side length of a square increases by 6cm, its area increases by 96cm. What is its original area?
18. 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?
19. If the side length of a square increases by 6cm in grade three, its area will increase by 96cm. Do you know what its original area is?
20. For a square, if one side is increased by 6cm and the other side is increased by 2cm, the area of the resulting large rectangle is increased by 108cm2 compared with the original square. Find the side length of the original square