4
12
45
1485
depends on what you mean by 5x5, would that be feet or yards If feet then 3.75 bags If yards then 33.75 A 50lb bag of sand is 0,5 cubic feet
540 feet2
That would depend on the density of the bags of topsoil.
1 50kg bag fill about 2 cubic f. so for 102cu.f. you'll need 51 bags
12
24g
45
10 bags will give you 6'2/3", seven bags will give you 11 bags will give you 7'1/3". Each bag is 2/3 cu feet.
1485
bags of what?
Another 53.75 square feet of tile would be needed.
depends on what you mean by 5x5, would that be feet or yards If feet then 3.75 bags If yards then 33.75 A 50lb bag of sand is 0,5 cubic feet
10 bags. Each 80 lb bag is 0.6 cubic feet, and your hole is 6 cubic feet.
There is no way to answer that without knowing how deep the concrete will be.