There is a pool of spring water constantly emerging, the full pool of water pumping, 6 pumps 4 hours, 5 pumps 5 hours, in 2 hours to dry, at least a few pumps Do it with a system of linear inequalities of one variable

There is a pool of spring water constantly emerging, the full pool of water pumping, 6 pumps 4 hours, 5 pumps 5 hours, in 2 hours to dry, at least a few pumps Do it with a system of linear inequalities of one variable

If one pump per hour is x, then six pumps pump 4 hours 4 * 6x = 24x5 pumps 5 hours 5 * 5x = 25X more than 1 hour more than 25x-24x water, so one hour more than 25x-24x water, so two hours more than 2 (25x-24x) water, five pumps 5 hours more than 25 (25x-24x) water

Calculation method of flat iron weight
It is 3 meters long, 5 centimeters wide and 5 mm thick. How can I calculate his weight

The specific gravity of iron is 7.9 grams per cubic centimeter,
The volume of the flat iron is 300cm * 5cm * 0.5cm = 750cc
7.9 * 750 = 5925g = 5.925kg
A: the mass of the flat iron is 5.925kg

How to calculate the weight of galvanized flat iron 40 * 4 one meter?
How to calculate the weight of galvanized angle iron L50 * 50 * 5 one meter?

-40 × 4 flat iron, 1.26kg/m;
L50 × 50 × 5 angle steel, 3.77kg/m;
The calculation formula is m = ρ v. for ordinary steel, the density is ρ = 7.85g/ml, and the actual volume is calculated by yourself

How many kg is the weight of six 30 cm thick, 6 m wide flat iron? How to convert?

How long? How long is the flat iron? Big brother
What specifications are not clear
Let's give you a formula to calculate for yourself... Mass kg = the volume of the object (V) times the density of the object
Volume of cuboid v = length x width x height
The density of iron is 7800kg / m3

Weight per meter of 4 * 4 galvanized flat iron

You're wrong. Multiply by several is the cross-sectional dimension of flat iron. 4 * 4 is not square. Is it 40 * 4? No matter what size of flat iron, the weight is equal to the specific gravity of width * thickness * length * iron. Remember the unit, don't make a mistake. It's in decimeter. The specific gravity is 7.8, and the weight is kg. For example, the weight of 40 * 4 (mm) flat iron is 0.4 * 0.04 * 10 * 7.8 = 1.248 kg

It is known that a well cover made of galvanized flat iron is 100m2, and the welding distance of galvanized flat iron is 11cm. How to calculate the weight of flat iron? Attachment: flat iron is 10 * 60, and the unit weight is 4.71 kg / m

The cumulative length of flat iron is calculated and multiplied by 4.71

The diameter of the steel pipe is 1.2 meters, the length is 12.5 meters, and the thickness is 1.2 cm. Please help me figure out the weight of this steel pipe!
If the answer is correct, I will add bonus points

First, calculate the volume of large cylinder v = bottom area s (3.14x0.6x0.6) x height h (12.5) = 14.13m3, then calculate the volume of hollow cylinder V1 = bottom area S1 (3.14x0.588x0.588) x height h (12.5) = 13.57m3, then the actual volume of iron pipe V2 = v-v1 = 0.56m3, and the mass of round pipe M = 7.8 when the density of iron and steel is 7.85t/m3

Steel pipe diameter 566 mm, thickness 10 mm, length 3.7 m, weight?

Inner radius 56.6 △ 2-1 = 28.3-1 = 27.3cm
Outer radius 56.6 △ 2 = 28.3cm
Volume (28.3 ^ - 27.3 ^) x3.14x370 = 64596 cm3
Weight 64596x7.8 = 503850g = 503.85kg

The diameter is 7.5cm, the length is 6m, the thickness is 2.5, how much is a heel?
How many steel pipes do you need for 10 tons? About how many square meters? Sorry, I'm not good at math. Please calculate

0.00617×75×75×6-0.00617×50×50×6=115.688kg=0.116t
1 △ 0.116 × 10 = 86.21 = 87

With this formula, the weight of steel pipe = (0.0245 x diameter x thickness x length) / 1000, the theoretical price is higher than the purchase price

Usually, in order to pursue the maximum benefit under the premise of meeting the standard, the steel pipe will be produced according to the negative deviation in the tolerance. For example, the thickness of the steel pipe is 5 ± 0.1 (equivalent to 4.5.1), and the manufacturer will control it around 4.95. In this way, the actual weight of the steel pipe is often lighter than the theoretical weight, so the converted price will be different