There are some cylindrical columns on the school playground, one of which has a cross-sectional perimeter of 12.56 decimeters and a height of 4 meters. How many cubic meters is the volume of this column? one

The perimeter of the cross section is 12.56 decimeters
So the radius of the circle is 12.56/3.14/2 = 2 decimeters
So the circle area = 3.14 * 2 * 2 = 12.56 square decimeter = 0.1256 square meter
Volume = 0.1256 * 4 = 0.5024 M3

RELATED INFORMATIONS

1. A cylindrical column, its bottom circumference is 1.57 meters, 5 meters high, what is the volume of this column?
2. There are four cylindrical concrete columns in the corridor of the newly built experimental building of Yucai primary school. The perimeter of the columns is 1.884 meters and 5 meters Now we need to paint these columns, 0.5 kg per square meter. How many kg of paint do we need To be 100% right, to explain, please
3. There are 10 cylindrical columns in the hall with a perimeter of 1.256 meters and a height of 5 meters. Now they need to be painted. How many square meters is the total area of painting? If 0.8 kg of paint is used per square meter, how much paint is needed to brush these columns?
4. There are 8 columns in a hotel hall. The perimeter of the bottom surface of each column is 25.12dm and the height is 7m. How much does it cost to paint these columns (10.5 yuan per square meter)
5. There are six big cylindrical columns in the lobby of a hotel. The perimeter of the columns is 25.12dm. All of them need to be painted. If the painting fee is 80 yuan per square meter, it will cost more It's due tomorrow. It's a formula
6. Build a cylindrical biogas digester. The perimeter of the bottom surface is 18.84 meters and the depth is 2 meters. Cement the four walls and the bottom surface of the digester. How many square meters is the area of the cement part?
7. Paint a column in a building. To calculate the area to be painted is to calculate the bottom area of the column
8. There are six columns in the hall. The bottom radius of each column is 4 decimeters and the height is 5 meters. If the painting fee is 0.5 yuan per square meter, how much is the total painting fee for the six columns?
9. There are 8 cylindrical columns in the school. The bottom diameter of each column is 4 decimeters and the height is 30 decimeters. Now we need to paint these columns. If 0.25 kg of paint is needed per square meter, how many kg of paint is needed? Final result: 7.536 find the detailed formula
10. There are 10 cylindrical columns in the school corridor. The diameter of the bottom of each column is 4 decimeters and the height is 2.5 meters. To paint these columns, 0.3 kg of paint is used per square meter. How many kg of paint is needed? There is a process
11. There are 10 cylindrical columns in the hall of the children's palace. The perimeter of its bottom surface is 1.8 meters, and the height is 6.5 meters. If you use about 650 grams of paint per square meter, you can finish these columns How many kilos of paint does the column need?
12. There are five same cylindrical columns in the hall. The perimeter of the bottom surface of each column is 3.14 meters and the height is 4 meters. To paint these columns, 0.5 kg per square meter, how many kg of paint do you need?
13. The volume formula of cone is______ The formula for calculating the volume of a cylinder is______ ．
14. How to calculate the surface area and volume of a half cylinder?
15. A cylinder is 8cm high and 25.12cm in circumference. Now it is cut vertically along its diameter and its surface area is increased______ Square centimeter
16. As shown in the figure, the circumference of the bottom surface of a cylinder is 20cm, the height AB is 4cm, and BC is the diameter of the upper bottom surface. An ant starts from point a, crawls along the side of the cylinder to point C, and the shortest distance is Why is ad half the circumference after unfolding? Isn't ad the diameter of a circle?
17. An ant starts from point a and crawls along the side of the cylinder to point C, Try to find the shortest way to crawl
18. As shown in the figure: the circumference of the bottom surface of a cylinder is 16cm, and the height is 6cm. BC is the diameter of the upper bottom surface. An ant starts from point a and crawls along the side of the cylinder to point C, then the shortest distance for the ant to crawl is______ cm．
19. The circumference of the bottom surface of a cylinder is 18.84 meters, and the height is 1.2 meters
20. 1. The expanded view of the side area of a cylinder is a square. The height of the cylinder is 28.26 cm, so its ground diameter is () cm? 2. Roll a rectangular paper of 16 cm long and 10 cm wide into a cylinder. When the height is 10 cm, the maximum perimeter of the bottom surface is () cm; when the height is 16 cm, the maximum perimeter of the bottom surface is () cm