To paint the lampposts with white paint, how many square meters should be painted

Apply white paint to lampposts, for example, a lamp holder should be painted to square meters. The 30 lamp holders are a lamp holder, and the 30 lamp holders in Figure 7 are equal to 30 lamp holders, how many square meters to be painted in total, which is square meters. That is to say, it costs 50 yuan for a square meter without painting, and there is a square meter, that is, yuan.

For this question, you can use the surface area of the box above + the side area of the cylinder below - the cross-sectional area of the cylinder.

The side area of the cylinder is:

The surface area of the box is:

The cross-sectional area of a cylinder is:

Comprehensive formula: A: The area that needs to be painted is square meters.

Hope it helps, hope. Good luck with your studies.

To calculate how many square meters of paint is needed, it is necessary to know the shape and size of the lampposts. Assuming that a lamppost is a cylinder, we can use the formula for the surface area of the cylinder to calculate it.

The formula for the surface area of a cylinder is: 2 rh + 2 r where r is the radius of the bottom surface of the cylinder and h is the height of the cylinder.

Assuming that the base radius of the lamppost is r and the height is h, we can substitute these values into the formula to calculate the surface area.

Assuming that the base radius of the lamppost is 2 meters and the height is 5 meters, we can calculate the surface area:

Surface area = 2 (2)(5) +2 (2) Based on the approximation of , we can calculate the approximation of the surface area:

Surface area 28

Square metre. So, to paint a lamppost with white paint, you need about a square meter of surface area to paint.

To paint the lampposts with white paint, how many square meters should be painted

According to the experience of the figure, it can be seen that the area of the painting is actually the surface area of the cuboid minus the area of the circle with a diameter of 12 cm, plus the side area of the cylinder, which can be solved by using the surface area formula of the cuboid and the calculation formula of the side area of the cylinder; (2) multiply the painted area of a street lamppost by 30 to find the painted area of 30 such lampposts, and then multiply by 5 yuan per square meter of labor cost to find the total labor cost required Answer: (1) 12 2 = 6 (cm) (16 12 + 16 12 + 12 12) square centimeter) square centimeter) square centimeter) square centimeter) = square meter) Answer:

To paint square meters; (2) Yuan) Answer: A total of labor costs are required Comments This question mainly examines the calculation of the surface area of the cuboid and the area of the cylindrical side. Knowledge points used: the relationship between unit price, quantity and total price

Hehe, I'm in the sixth grade, and the math teacher's homework on the weekends is also ......I've just done the answer here:

First find out the area of the side of the cylinder to be painted: the diameter of the bottom surface height = side area [12 square centimeters)] and then find the above cuboid to be painted: (length and width + length and height + width and height) 2 = the surface area of the cuboid that is, the area of the cuboid painted [(12 12 + 12 16 + 12 16) 2 = 1056 (square centimeters)] but!

There is a part of the bottom of the cuboid that is attached to the upper and lower surface of the cylinder, so the exposed part is required to subtract the area below the cuboid from the upper and lower area of the cylinder to find the exposed part [1056 (12 2) square centimeters)] and the lower bottom area of the cylinder is attached to the bottom surface, so there is no need to paint Finally, add up the two numbers to be the part of the whole lamp holder to be painted [square centimeters)] The question requirement is to ask how many square meters to convert square centimeters into square meters [square centimeters = square meters] Therefore, the final number is square meters, and the composite formula is:

12 square centimeters.

Square metre. The above found 1 lamp holder to paint square meters, then 30 lamp holders, a lamp holder to paint 30 lamp holders, 30 lamp holders, a total of how many square meters [square meters)] then each square meter to paint 50 yuan, there is a square meter, that is, there is a 50 yuan [yuan)].

The composite formula is: yuan).

Done: Thank you

Generally, the wallpaper can be directly pasted on the gypsum board, but it should be noted that the surface of the gypsum board is not very flat, and the effect of pasting it will not look good. The function of the paint film base film is to close the wall, and after the paint film is dry, you can paste the wallpaper.

The length of the previous week plus the length of the next circumference divided by two, and then multiplied by the height, is the paint area of the light pole. If it is a standing light pole, the cost of scaffolding will be added. I hope my answer can help you.

Cylindrical area.

Box area.

30 lampposts with an area of 30*5*

The length of the previous week plus the length of the next circumference divided by two, and then multiplied by the height, is the paint area of the light pole. If it is a standing light pole, the cost of scaffolding will be added. I hope my answer can help you.

Hehe, I'm in the sixth grade, and the math teacher's homework on the weekends is also ......I've just done the answer here:

First find out the area of the side of the cylinder to be painted: the diameter of the bottom surface height = side area [12 square centimeters)] and then find the above cuboid to be painted: (length and width + length and height + width and height) 2 = the surface area of the cuboid that is, the area of the cuboid painted [(12 12 + 12 16 + 12 16) 2 = 1056 (square centimeters)] but!

There is a part of the bottom of the cuboid that is attached to the upper and lower surface of the cylinder, so the exposed part is required to subtract the area below the cuboid from the upper and lower area of the cylinder to find the exposed part [1056 (12 2) square centimeters)] and the lower bottom area of the cylinder is attached to the bottom surface, so there is no need to paint Finally, add up the two numbers to be the part of the whole lamp holder to be painted [square centimeters)] The question requirement is to ask how many square meters to convert square centimeters into square meters [square centimeters = square meters] Therefore, the final number is square meters, and the composite formula is:

12 square centimeters.

Square metre. The above found 1 lamp holder to paint square meters, then 30 lamp holders, a lamp holder to paint 30 lamp holders, 30 lamp holders, a total of how many square meters [square meters)] then each square meter to paint 50 yuan, there is a square meter, that is, there is a 50 yuan [yuan)].

The composite formula is: yuan).

(1) 12 2 = 6 (cm).

square centimeter) square centimeter).

square centimeter) = square meter).

Answer: to paint square meters;

A: A total of labor costs are required

If a lamp holder is to be coated with square meters, then 30 lamp holders are to multiply a lamp holder by 30 lamp holders, and then equal to 30 lamp holders, how many square meters to be painted in total, generally its formula is square meters, that is, the white paint on the lamppost generally needs nine. 04608 square meters.

I didn't see your picture, but the street lamp is cylindrical, and the side is a rectangle, for example, if you wrap it in paper, it's a rectangle, and measure the area of the paper. In fact, you only need to measure how long the week of the lamppost is, and then measure how high it is, and multiply the two numbers to get the square meter of the area.

The length of the previous week plus the length of the next circumference divided by two, and then multiplied by the height, is the paint area of the light pole. If it is a standing light pole, the cost of scaffolding will be added. I hope my answer can help you.