It is known that the circumference of a rectangle is 20cm and the length is 2cm more than the width. If the length of a rectangle is xcm and the width is YCM, the equations listed are as follows You have to have a system of equations,

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• 1. The perimeter of a rectangle is 118cm, and its length is 20cm more than its width?
• 2. The perimeter of a rectangle is 20cm. The ratio of length to width is 4:1. What is the area of the rectangle?
• 3. The circumference of a rectangle is 26cm. If the length of the rectangle is reduced by 1cm and the width is increased by 2cm, it will become a square. If the length of the rectangle is xcm, the equation () A. x-1=（26-x）+2B. x-1=（13-x）+2C. x+1=（26-x）-2D. x+1=（13-x）-2
• 4. The circumference of a rectangle is 26cm. If the length of the rectangle is reduced by 1cm and the width is increased by 2cm, it will become a square. If the length of the rectangle is xcm, the equation () A. x-1=（26-x）+2B. x-1=（13-x）+2C. x+1=（26-x）-2D. x+1=（13-x）-2
• 5. The circumference of a rectangle is 26cm. If the length of the rectangle is reduced by 1cm and the width is increased by 2cm, it will become a square. If the length of the rectangle is xcm, the equation () A. x-1=（26-x）+2B. x-1=（13-x）+2C. x+1=（26-x）-2D. x+1=（13-x）-2
• 6. The sum of the edges of a cuboid is 80cm, and its bottom is a square with a circumference of 20cm. The volume of the cuboid is
• 7. If the perimeter of the base is 20cm, the volume of the cuboid can be calculated No, it's a cube. 20 / 4 = 5, 5 * 5 * 5 = 125 cubic centimeter, please come from university
• 8. A cuboid, its bottom circumference is 20cm, its volume is () cm3
• 9. A cuboid. The bottom surface is a cuboid with a circumference of 24 cm. If you unfold the side of the cuboid to get a cuboid, what is the surface area of the cuboid
• 10. Divide a cube with an edge length of 20 cm into two identical cuboids. The surface area of each cuboid is______ ．
• 11. If the circumference of a rectangle is 12cm and the length is twice the width, what is its area?
• 12. The circumference of the rectangle is 12cm, and the length is twice the width. If the width is xcm, the equation about X can be listed as follows:
• 13. The perimeter of a rectangle is between 40 cm and 50 cm. If the ratio of its length to width is 5:7, what is the perimeter of the rectangle? What is the area
• 14. 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
• 15. 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)
• 16. 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
• 17. 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
• 18. 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
• 19. 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;
• 20. 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.