That depends how deep you want your covering.
You'll need a volume of 256 x depth_in_feet cubic feet of dirt to cover the area of 8 ft by 32 ft.
How much cement is needed to cover 192 square feet of area
Niether; It's surface area.
55 square yards.
6,000 cubic feet1,500 ft2 x 4 ft = 6,000 ft3
270 sq feet of whatever your covering it with. To find area, just multiply the 15' by the 18' and you have your answer. If your saying what you need to cover it with is 3' x 3' (such as tiles) then just divide 270 by 3 (which would mean you need 90 of them).
You will need 1500 cubic feet.
That would depend on how deep you want the dirt to be... to cover an area that size with dirt just one inch thick...you'll probably need around 20 tons....so multiply by 20 tons however many inches thick you'll need it
How much cement is needed to cover 192 square feet of area
Niether; It's surface area.
You need just enough to cover the surface area of the submerged part.
You will need 234 square feet of turf to cover that area.
55 square yards.
You need to specify how thick you want the top soil to be
6,000 cubic feet1,500 ft2 x 4 ft = 6,000 ft3
You would need about 1 cubic yard of topsoil to cover a 200 square foot area with 1 inch of soil.
To calculate the volume of dirt needed to fill the area, you would need to know the depth of the area in yards. If the depth is 3 yards, then you would need 1800 yards of dirt (600 cubic yards รท 3 yards). If the depth is 1 yard, then you would need 600 yards of dirt.
You need to know the size of lawn, and the grass seed bags will tell you how much area they cover.