9 metre2
It depends on how deep it is. If it is 6 inches deep, you will need 77 yards.
1.53 cubic yards.
It depends on the thickness of slab. A yard of cement contains 9 cubic feet. Thus, it would cover 9 square feet if the slab was 1 foot thick. For a 4 inch thick slab, it would cover 3 times as much area, or 27 square feet.
It would be helpful to have units of measurement in the equation. However, pouring a slab I'll presume your measurements are feet x feet x inches. The volume of this slab is 55 x 15 x 0.5 (6 inches is 0.5 ft) = 412.5 cubic feet 1 yard of cement (more likely concrete as a cement slab will crumble under load) is equal to 27 cu.ft. So, 412.5 cu.ft. needed / 27 cu. ft. / cu. yd. = 15.2777...cu. yards. you will need to order 15.27777...cu. yards, as a yard isn't sold in this decimal you will need to order 15 1/2 yards of concrete to pour your slab.
I'll make the assumption that 150 is meant to be metres. 150x6 is 900, x 2.5 is 2250
one yard of cement will make a 8 x 10 square foot slab at 4 inches thick, that's 80 sq. feet per yard of cement at 4 inches thick.
You will need 6.17 cubic yards of cement.
6
8.64 cubic yards of cement.
It depends on how deep it is. If it is 6 inches deep, you will need 77 yards.
You will need 5.5 40kg bags for this floor. This allows for a typical waste factor of 5%
Brute, manual effort. A sledgehammer or jack hammer are the two most common methods for a cement slab or sidewalk. Roadways need much bigger equipment.
If you mean 115 feet by 17 feet by 4 inches thick, you will need a minimum of 24.14 cubic yards.
Assuming that's 30 ft X 30 ft X 6 inches, you will need 20 cubic yards
28 feet by 32 feet by 6 inches thick requires at least 16.59 Cubic Yards.
You will need 27.6 cubic yards of cement.
You will need at least 9.68 cubic yards of cement.