Calculation formula of earthwork Subgrade I'm an apprentice in engineering survey, the calculation formula of common measurement formula in earthwork subgrade engineering, the calculation of the width between the slope toe [top] line and the center pile, the calculation of the elevation of digging culvert, etc., and the calculation of the excavation elevation, etc

Calculation formula of earthwork Subgrade I'm an apprentice in engineering survey, the calculation formula of common measurement formula in earthwork subgrade engineering, the calculation of the width between the slope toe [top] line and the center pile, the calculation of the elevation of digging culvert, etc., and the calculation of the excavation elevation, etc

There are many answers to your questions. Let's talk about it briefly: first of all, you know geometry (very simple) mainly includes triangle and trapezoid. Subgrade Earthwork is calculated in sections along the longitudinal direction according to the cross section of the road. You need to know basic measurement and measure the height difference. According to the requirements of the drawing, the width of the slope toe is measured. The excavation and filling of the slope toe are different

If a cylinder with a height of 5 decimeters is cut into two equal parts along the bottom diameter, the surface area will increase by 40 square decimeters. What is the volume of the cylinder?

The radius of the bottom of the cylinder is 40 △ 2 △ 5 △ 2 = 2 (decimeter), the volume of the cylinder is 3.14 × 22 × 5, = 12.56 × 5, = 62.8 (cubic decimeter), a: the volume of the cylinder is 62.8 cubic decimeter

A cylinder has a side area of 12 square meters and a radius of 2 meters
According to the derivation of cylinder volume in the second volume of the sixth grade textbook, the height of the cylinder is not calculated first, but solved by a simpler method

The volume of the cylinder can be obtained by dividing the side area by 2 to get π Rh (equivalent to the bottom area of the assembled approximate cuboid) and multiplying R (equivalent to the height of the cuboid)

The volume of a cylinder is 180 square meters. The side area is 120 square meters?

180=3.14*r^2*h
120=3.14*2*r*h----60=3.14*h*r
180=3.14*r^2*h=3.14*r*h*r=60r
r=3

A cylinder has a volume of 250 cubic centimeters and a side area of 100 cubic centimeters. What is the radius of the bottom of the cylinder?

Circumference s = 2 π R
Side area = s · H = 2 π RH = 100
πrh=50
Volume = π R · R · H = 250
r=5

Saw a 2-meter-long cylinder timber into three sections of the same length, increase the surface area by 240 square centimeters, and calculate the original timber volume

A 2-meter-long cylinder wood is sawed into three sections of the same length, adding four bottom areas of 240 cm3
So the bottom area is 60cm3
The volume is 60x200 = 12000cm3 = 12dm3

A 3-meter-long cylinder with a diameter of 4 decimeters at the bottom is sawed into three equally long sections. How many square centimeters has the surface area increased?

Saw into 3 sections, increased the size of 4 bottom areas,
So:
Increased area
=3.14×（4÷2）²×4
=24 square decimeters
=5024 square centimeters
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A cylindrical wood is 10m long, and the surface area increases by 1.2 M2 after forming two columns. How many cubic meters is the volume of wood

After cut into two, increase the area of two end faces
2S end = 1.2
S-end = 0.6
It turns out that the volume of this wood = s end * length = 0.6 * 10 = 6m ^ 3

Cut a 2-meter-long cylinder wood into three sections, the surface area increases by 12 square decimeters, which is the same as the volume of wood______ Cubic meter

According to the meaning of the question, the area of the bottom of four columns is increased after the average section is three, so the area of the bottom of the column is: 12 △ 4 = 3 (square decimeter) 3 square decimeter = 0.03 square meter. From v = sh, the volume of this wood is 0.06 cubic meter. So the answer is: 0.06

Cut a 2-meter-long cylinder wood into three sections, the surface area increases by 12 square decimeters, which is the same as the volume of wood______ Cubic meter

According to the meaning of the question, the area of the bottom of four columns is increased after the average section is three, so the area of the bottom of the column is: 12 △ 4 = 3 (square decimeter) 3 square decimeter = 0.03 square meter. From v = sh, the volume of this wood is 0.06 cubic meter. So the answer is: 0.06