Convert everything to feet (10 inches = 10/12 feet), and multiply. The result will be in cubic feet.
8 ft * 10 ft * 0.5 ft = 40 cubic feet
An area 10 foot x 10 foot is 100 square feet. 100 cubic feet of sand would cover it with a one foot deep layer of sand. If the sand needs to be 6 inches deep, then 50 cubic feet are be needed, or 25 cubic feet if the sand is to be 3 inches thick.
That would take 250 cubic meters of sand to fill as 10*5*5 is 250.
10 x 10 x 2/3 ie 66.67 cu ft = 66.67/27 cu yds, call it 2-and-a-half.
8*10*4/12 = 26 and 2/3 cubic feet
8 ft * 10 ft * 0.5 ft = 40 cubic feet
An area 10 foot x 10 foot is 100 square feet. 100 cubic feet of sand would cover it with a one foot deep layer of sand. If the sand needs to be 6 inches deep, then 50 cubic feet are be needed, or 25 cubic feet if the sand is to be 3 inches thick.
That would take 250 cubic meters of sand to fill as 10*5*5 is 250.
10 x 10 x 2/3 ie 66.67 cu ft = 66.67/27 cu yds, call it 2-and-a-half.
I wasn't sure is fhe 10 was for inches or feet, so both calculations are below. 10 inches deep: 80 x 50 x 1 = 4000cf x 10/12 = 40000 / 12 = 3333.334 cubic feet of sand 10 feet deep: 80 x 50 x 10 = 40,000 cubic feet of sand
To determine how many bags of sand are needed for a 10 x 10-foot patio that is 2 inches deep, first calculate the volume of sand required. The area is 100 square feet, and the depth in feet is 2 inches (which is 1/6 feet). Therefore, the volume is 100 x (1/6) = approximately 16.67 cubic feet. If a standard bag of sand covers about 0.5 cubic feet, you would need roughly 34 bags of sand (16.67 / 0.5 = 33.34).
8*10*4/12 = 26 and 2/3 cubic feet
To find the weight of sand in 1 acre at a depth of 10 feet, first calculate the volume. An acre is 43,560 square feet, so 1 acre at 10 feet deep has a volume of 435,600 cubic feet. Sand typically weighs about 100 pounds per cubic foot, so the total weight is approximately 43,560,000 pounds. Dividing by 2,000 gives about 21,780 tons of sand.
You would need about 13 cu yards or about 15 tons.
That depends on how deep you want the top soil! 5' X 8' = 40 square feet. If you want it 1' deep you would need 40 Cubic Feet, 3" deep you would need 10 cubic feet of top soil.
50 x 5 x 0.33333r = 83 cubic yards
You will need 1500 cubic feet.