40 Tons
4.938 cubic yards.
There are 27 cubic feet in a cubic yard. 10 x 20 x .33 = 66 cubic feet / 27 = 2.44 Yards.
20 feet x 20 ft x .3333 ft = 133.33 cubic feet / 27 cubic feet per yard = 4.94 cubic yards
For a 9' x 20' by 4" slab you will need 2.22 cubic yards.
14.8 cubic yards will work but round to 15 to be sure.
The easiest way is use Rule 324 (Length in Feet X Width in Feet x Height in Inches) Divided by 324 = Cubic Yards of concrete. Example 4' x 20' x 4"=320 Divided by 324 = 0.9876 Cubic Yards. Or Rule 27 (Length in Feet x Width in Feet x Height in Feet) Divided by 27 = Cubic Yards of Concrete. Example 4' x 20' x 0.33333333'=26.6666664 Divide by 27 = 0.9876 Cubic Yards.
The area of that slab is (60 x 20) = 1,200 square feet = 1331/3 square yards.But that doesn't tell you how much concrete you'll need in order to pour it.What you really want to know is the cubic yards of volume required. That'swhat the concrete guys are talking about when thery say "yards" of concrete.1 cubic yard = 27 cubic feetVolume = (length) x (width) x (height) = (60 x 20 x 1/2) = 600 cubic feet = 222/9 cubic yards.( 22.22222... )
To calculate the amount of concrete needed for a 20 by 30 slab, first determine the area in square feet: 20 feet × 30 feet = 600 square feet. If the slab is, for example, 4 inches thick, convert the thickness to feet (4 inches ÷ 12 inches/foot = 0.33 feet). The volume in cubic feet is then 600 square feet × 0.33 feet = 198 cubic feet. Finally, convert cubic feet to cubic yards by dividing by 27 (since there are 27 cubic feet in a cubic yard): 198 ÷ 27 ≈ 7.33 cubic yards of concrete needed.
You have 15.2911 cubic meters. 1 cubic yard is equal to 0.764555 cubic meter.
That is an area measurement, whereas concrete is measured in volume, typically cubic yards in the US. The costs vary widely based on local availiblity of materials and the type of concrete mix. The national average is about $100 for a cubic yard of concrete.
I would like to see 20 cubic yards on a tandem. I would hate to pay that overload ticket.
(20-ft x 18-ft x 1/3-ft) / (27 cubic feet / cubic yard) = 4.444 cubic yards (rounded).