There is about 11 gallons in 1.5 cubic feet so you can completely fill three 3 gallon pots.
It is not clear what you mean by "5x5x1 sq feet". If all three are measures of length then they are cubic feet, Alternatively, they are 5x5 = 25 plots of 1 sq ft each. You must learn to check for dimensional consistency and to use measurement units every time to avoid this sort of ambiguity.
The soil type and amount of compaction will cause the amount to vary, but in general, using Med PI common fill with minimum compaction will require about 41,000 cubic yards to raise 5 acres 4' in elevation
400 mg lead in each kilogram of soil.
plinth beam is a part of a structure can transfer loads to the adjacent columns,grade beam is a type of foundation system used to distribute the weight of a building over unstable soil. The grade beam may sit directly on the loose soil.
to what depth???
To what depth?
1 yard topsoil covers 100 square feet to 3 inches, 200 square feet to 1.5 inches and 300 square feet to 1 inch.
There are 144 square feet in 2000 gallons, assuming you are asking about surface area coverage. This can vary based on how you are spreading the gallons (e.g., on soil, on a floor).
400
16.02
3X.5 = 1.5 Sq Feet
To calculate the amount of soil needed, you multiply the area by the desired depth. In this case, you have 9300 square feet and want a depth of 12 inches. Convert the depth to feet (12 inches = 1 foot) and multiply: 9300 square feet x 1 foot = 9300 cubic feet of soil. So, you need 9300 cubic feet of soil to cover the area with a depth of 12 inches.
to figure yards of soil you need cubic feet ( 400 sq ft X how deep??)then divide by 9
3600 / 12 = 300 tons
1 cubic yard = 27 cubic feet(area) x (1/2 foot) = 27 cubic feetarea = 27/0.5 = 54 square feet
None. A square foot is a measure of area and so has no volume. Since there is no volume, there can be no mass.