The bottom radius of a cylinder is 2 decimeters, and the side area of the cylinder is 62.8 square decimeters. What is the surface area of the cylinder?

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• 1. The surface area of a cylinder is 18.84 square decimeters, and the diameter of its bottom is 2 decimeters
• 2. A cylinder has a surface area of 408.2 square decimeters and a radius of 5 decimeters. How many square decimeters is the volume of the cylinder?
• 3. After sawing a 2-meter-long cylinder into three small cylinders, the total surface area of the cylinder increases by 12.56 square decimeters. The original volume of the cylinder is______ Cubic decimeter
• 4. A 1.5-meter-long cylinder is sawed into four identical cylinders, and the surface area increases by 56.52 square decimeters. What is the original volume of the cylinder
• 5. As shown in the figure on the right, a 4-meter-long cylindrical steel is cut into two sections on average. The surface area is increased by 12.56 square centimeters, and the volume of each section of steel is several cubic centimeters Pay attention to the unit
• 6. 2 meters of cylindrical steel, cut into four small columns, the surface area than the original increased by 56.52 square centimeters. The volume of this cylindrical steel is () cubic centimeters
• 7. A 3 meter long round steel is cut into three sections, and the surface area is increased by 12.56 square decimeters
• 8. A round steel 1.2m, sawed into two sections of 0.6m, surface area plus 12.56m2, calculate the volume of round steel
• 9. A 3 meter long round steel is cut into three sections, and the surface area is increased by 12.56 square decimeters
• 10. A 3 meter long round steel is cut into three sections, and the surface area is increased by 12.56 square decimeters
• 11. The surface area of a cylinder is 156.52 square meters, and the side area is 100 square meters. What is the radius of the bottom of each cylinder? real
• 12. The surface area of a cylinder is 156.52 square decimeters, and the side area is 100 square decimeters. What is the bottom radius of this cylinder
• 13. A small cylinder with a height of 2 decimeters is cut off from a cylinder with a diameter of 4 decimeters on the ground. The surface area of the original cylinder is reduced by () square meters
• 14. The surface area of a cylinder is 72 square decimeters, and its height is three times the radius?
• 15. When a cylinder with a radius of two decimeters is cut to a length of three decimeters, how many square decimeters is the surface area of the remaining cylinder reduced and how many cubic decimeters is the volume reduced?
• 16. If the height of a cylinder is 20cm minus 5cm, the surface area of the cylinder will be reduced by 31.4cm?
• 17. The height of a cylinder is 20cm. When it is loaded 5cm away, the surface area of the cylinder is reduced by 31.4 square cm. What is the original surface area of the cylinder?
• 18. The height of a cylinder is 20cm. After the cylinder is cut off 5cm, the surface area of the cylinder is reduced by 31.4 square centimeters. How many square centimeters is the original surface area of the cylinder Is to find the surface area of the original cylinder QAQ check the answer, we calculate is 131.88 square centimeters If it's right, give the formula. If it's wrong, give the formula as well= Kang Mang~
• 19. A 2 cm high cylinder with a side area of 12.56 square centimeters. What is the diameter of its bottom
• 20. Using a piece of rectangular paper 18.84 cm in length and 12.56 cm in width, two different cylindrical paper cylinders are rolled respectively, and the bottom areas of the two cylindrical paper cylinders are different How many centimeters is it Bring the formula