The bin is an open cuboid with a volume (v) = length x width x depth (d).
640 = 8 x 10 x d = 80d : d = 640 ÷ 80 = 8 feet.
The depth is 8 feet.
At a greater depth, there is a greater pressure, period. The amount of water in the dam is irrelevant.
62/3 cubic yards for every 1-foot deep. 5 cubic yards for every 9-inches deep. 31/3 cubic yards for every 6-inches deep. 5/9 cubic yard for every 1-inch deep.
This is a volume of 3.33 cubic meters.
There are 60,000 m3 in a 15cm deep plot with an area of 40 hectares.
50
ydtt
27 inches deep.
If it is rectangular, it holds 80 cubic feet of water per 1 ft of depth. About 7.48 gallons (US) per cubic foot, gives 598 galls per each foot of depth. 3 ft deep = 1795 gallons (US).
At a greater depth, there is a greater pressure, period. The amount of water in the dam is irrelevant.
2.5 meters deep
Assuming a rectangular (3-D) shape, multiply the three numbers. The answer will be in cubic feet.
Figure out how many cubic meters it holds. A cubic meter is 1000 liters, so go from there.
That's going to depend on the shape of the container, especially on how much 'real estate' the base of the container covers. For discussion, imagine that the container is a square fish tank, and the four walls go straight up from the four sides of the square base. -- If the base of the tank covers 64 square feet and it holds 64 cubic feet, then the water in it is 1 foot deep. -- If the base of the tank covers 1 acre and it holds 64 cubic feet, then the water in it is 0.0176 inch deep. -- If the base of the tank covers 1 square inch and it holds 64 cubic feet, then the water in it is 9,216 feet (1.745 mile) deep.
If the whole container is rectangular, then its volume is 18" x 24" x 30" = 12,960 cubic inches = 7.5 cubic feet = 56.104 gallons
120 cft / 40*12 sq ft = 0.25 ft = 4 inches.
5200 cubic feet
(21 x 18 x 9) = 3,402 cubic feet = 126 cubic yards = about 25,448.73 gallons