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

2 meters = 20 decimeters, 12.56 △ 4 = 3.14 (square decimeters), 3.14 × 20 = 62.8 (cubic decimeters); answer: the original volume of this wood is 62.8 cubic decimeters. So the answer is: 62.8

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1. 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
2. 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
3. 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
4. A 3 meter long round steel is cut into three sections, and the surface area is increased by 12.56 square decimeters
5. A round steel 1.2m, sawed into two sections of 0.6m, surface area plus 12.56m2, calculate the volume of round steel
6. A 3 meter long round steel is cut into three sections, and the surface area is increased by 12.56 square decimeters
7. A 3 meter long round steel is cut into three sections, and the surface area is increased by 12.56 square decimeters
8. Roll a rectangular piece of paper 12.56 cm long and 9.42 cm wide into a cylinder. The volume of the cylinder is______ Cubic centimeter or______ Cubic centimeter
9. Use a piece of square paper 12.56 cm long and 8 decimeters wide to form a cylinder. What is the volume of the cylinder?
10. A rectangular paper can just make a cylinder, the length of the rectangle is 20.56 cm
11. 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?
12. The surface area of a cylinder is 18.84 square decimeters, and the diameter of its bottom is 2 decimeters
13. 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?
14. 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
15. 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
16. 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
17. The surface area of a cylinder is 72 square decimeters, and its height is three times the radius?
18. 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?
19. If the height of a cylinder is 20cm minus 5cm, the surface area of the cylinder will be reduced by 31.4cm?
20. 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?