300 square feet (25 x 12 = 300).
To determine how many 80 lb bags of cement are needed for a 5x7 area that is 4 inches thick, first calculate the volume in cubic feet. The volume is 5 ft × 7 ft × (4/12) ft = 11.67 cubic feet. An 80 lb bag of cement typically covers about 0.6 cubic feet, so you would need approximately 20 bags of cement (11.67 ÷ 0.6 ≈ 19.45). Therefore, you would need 20 bags to complete the project.
40" x 40" x 3" requires 0.1 cubic yards of cement. If you mean 40 x 40 feet, you will need 14.81 cubic yards of cement.
20
To calculate the number of 80 lb bags of cement needed for a 10x12 foot slab that is 3 inches thick, first determine the volume of the slab in cubic feet: 10 ft x 12 ft x (3/12) ft = 30 cubic feet. One 80 lb bag of cement typically yields about 0.6 cubic feet of concrete. Therefore, you would need approximately 30 / 0.6 = 50 bags of 80 lb cement to complete the slab.
There are 27 cubic feet in a cubic yard.
Square feet have dimensions L2 while cubic feet have dimensions L3 so they are not interchangeable.
"Hectare" is a unit of area. It has no qubic meters in it.
It depends upon how deep the cement will be.
13*13*6=1014 yards of cement
1.85 cubic yards of cement.
.936 cubic feet
The answer depends on the size of the cement blocks which are not an international standard.
depends how deep
What is a Qubic litre? A litre is a measure of volume - with dimensions [L3]. A cubic litre (if that is what it is meant to be) would then be a "volume" measure in 9-dimensional space!
About 3.
27 cu ft