You will need
- measuring tool;
- is the price list for lumber;
- - kubaturnykh.
Determine which kind of lumber you need. Consider them in different ways. The cost is influenced by some other factors – the species of wood, degree of processing (boards can be edged or unedged), grade, length. Short boards are cheaper long. The lumber has its own standards before purchase is very helpful to read them. Do not hesitate to ask the shop price list.
One of the types of wood, which often requires gardeners – slab. It should be graded depending on the length. One group includes business slab over a length of 2 m, the other – in short this length.
Lay the slabs in a pile. Fold it so that the thick part of one of the trunk side by side on both sides comly others. The planks are stacked in pairs, adjoining flat portions. Convex surface "look" up and down. The stack must be very dense and have right angles.
Measure the length, width and height of the pile. For lumber there are two types of cubic meters – stacked and tight. Dense represents, for example, a cube made from a single piece of wood. Thus it is possible to measure, for example, the amount of smooth boards. In the case of drum you are dealing with a stacked cubic meter.
The ratio of lumber in stock and dense cubic yards, it is very important for cost calculation. So the buyer had to pay for the share meter as dense, has a special conversion factors that ranged from 0.43 for long debarked slabs to 0.56 for a short debarked.
The volume of all the other lumber can be determined by direct measurements of each Board or each log. If the boards are piled in a dense rectangular stack, you measure its length, width and height. Multiplying these parameters, you will receive a volume. To log important parameters are the length and diameter of the saw cut. Cut down barrel with some degree of approximation can be taken as a cylinder. The basis is provided by the upper end. Some features of the calculation of the volume of unedged boards. For the width is taken the arithmetic average of both plasma (i.e. flat surfaces).
Advice 2: How to calculate the volume of a cube
Calculate the volume of a cube may be necessary not only in solving mathematical problems. For example, you need to know how many bricks in a package of the cubic form or how much liquid or dry ingredients will fit into a container. For this course, you will need to clear up a few options, but first, you need to calculate the volume of a cube.
You will need
- To recall the definition and properties of a cube
- Measuring device
Remember what CC It is a right hexahedron — geometric solid, each face of which represents a square. Since all sides of a cube are the same — and faces his equal, as were the ribs. That is, to determine the volume you need to know the size of only one face.
Remember, what is the volume of the parallelepiped. It is equal to the area of the base multiplied by the height. But the cube length, width and height are equal. The cube can be put on any face, all the same, the footprint will be the same as in the original position. Indicate the edge of the cube as well. Find the area of the base. It is equal to the product of the length by the width, that is, S=a2..
Calculate the volume by multiplying the area of the base A2 at the height which in this case is also equal. Accordingly, the volume V is equal to the size of the edge of the cubeerected in the third degree. V=a3.
If you need to calculate the amount of a substance, which is supposed to fill a container of cubic shape, it is necessary to know the density of the substance. This number will be equal to the density multiplied by the volume of the cube. And in order to calculate, for example, the number of bricks in a container of cubic shape, it is necessary to calculate the volume of each brick, then divide the volume of the container to the volume of the brick.
In some cases it is necessary to find the volume and the area of the walls - for example, when calculating the number of glass for the aquarium. Since all faces of a cube are the same, the square sum of the areas of the 6 faces, that is expressed by the formula S=6a2
Try practical measurements as accurate as possible. You can use a ruler, tape measure, bar-compass. Importantly, the division met the standards.