Not sure what 2b is but crushed concrete with 1 1/2" rock will cover about 60 square feet. 15 tons ends up being around 12 cubic yards.
That depends on how DEEP you want the concrete !
5 yds - One yard of concrete will cover approximately 81 square feet 4" deep.
2.2222222201902215 cubic yards
How deep do you want that ?If you want it 1.6 inches deep, then it can cover 1 square foot.If you want it 10-ft deep, then it can't cover that much area.
Usually a cubic yard will cover 15 square yards at 3 inches deep so I would reckon on 22 cubic yards. Hold on that I've got that wrong it's 2 cubic yards .Sorry.
1 (cubic yard) = 46 656 cubic inchesIf the depth is 2 inches then the area it will cover is 46656/2 square inches = 23,328 square inches. Convert 23,328 square inches to square yards23 328 (square inches) = 18 square yards
It would depend on the size of the aggregate
The answer will depend on how deep a layer of sand.
2.37 cubic yards of stone for every 3 inches deep it needs to be
The 4 inches is 4/12 of a foot or 1/3 foot. Length times width times height is the volume, so 2856 (the area in square feet) times 1/3 (the depth in feet) = 952 cubic feet.