There are four cuboid pillars in the auditorium. The bottom is a square with a side length of 5 decimeters and a height of 5 meters. What is the area of painting these pillars/
Only brush the side, a total of 4 * 4 = 16 sides, each side is 0.5 * 5 = 2.5 square meters, so the total is 2.5 * 16 = 40 cubic meters
RELATED INFORMATIONS
- 1. There are four cuboid columns in the school auditorium, with a square bottom, a side length of 0.6 meters and a height of 5 meters. Paint the four sides of the column Please mark whether you are sure after answering,
- 2. There are four cylindrical columns in the corridor outside the classroom. The diameter of the bottom of each column is 6 decimeters. Paint these columns with 0.3 paint per square meter Kg, how many kg of paint are needed? (the number obtained shall be kept to two decimal places)
- 3. There are 10 columns in the corridor. The radius of the bottom of each column is 4 decimeters and the height is 2.5 meters There are 10 cylindrical columns in the school corridor. The bottom radius of each column is 4 decimeters, and the height is 2.5 meters. To paint these columns for the celebration of June 1 performance, 0.3 kg of paint is used per square meter. How many kg of paint are needed?
- 4. There are two cuboid pillars in the children's palace, 4 meters high, with a square bottom and a circumference of 1.2 meters, What is the total area of the two pillars painted? It's a formula!
- 5. The diameter of the bottom of the pillars in the hall is 6 decimeters, and the height is 5 meters. Paint the eight pillars. Use 0.5 kg per square meter. How much paint do you need?
- 6. The lobby of a hotel has 6 large cylindrical columns, 10 meters high and 25.12 decimeters in circumference. All the columns should be painted. If the painting fee per square meter is 80 yuan, how much will it cost?
- 7. The side of a cylinder is a square. The perimeter of the square is 6.28 decimeters. What is the volume of the cylinder? Help me
- 8. There is a cylindrical pile, cut along the diameter, the section is a square, the circumference of the bottom of the cylinder is 12.56 decimeters, circle
- 9. A cylinder with a height of 6.28 decimeters, its side area expansion is just a square, how many square decimeters is its surface area? Make it clear,
- 10. There are two ways to encircle a cylinder with a rectangular sheet of iron 31.4 decimeters long and 12.56 decimeters wide. One is () decimeters in diameter and () decimeters in height. The other is () decimeters in diameter and () decimeters in height
- 11. There are four cuboid shaped pillars in the auditorium. The bottom is square, with a side length of 6 decimeters and a height of 5 meters. If you want to paint the four pillars, how many square meters is the paint area?
- 12. 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
- 13. 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
- 14. 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?
- 15. Paint a column in a building. To calculate the area to be painted is to calculate the bottom area of the column
- 16. 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?
- 17. 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
- 18. 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)
- 19. 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?
- 20. 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