Volume of a cylinder is pi * r (radius) squared * height = 3.14159 * 4 * 20 = 251.3274 cubic feet. 7.48052 gallon of water per cubic foot. Therefore 1880.0597 gallons I assume you mean 4 foot diameter circle. If you meant circumference then the formula changes. Since you know the circumference (2 pi r) you need to calculate the area (pi r squared) Therefore 4 = 2 pi r calculating radius r = 4 / 2 pi. = .6366198. Substituting r above you get 25.4648 cubic feet or 190.4899 gallons
Two feet of water in an 8-foot round pool is about 755 gallons.
2.000 gallons
2,353.968 gallons.
It depends how deep it is.
7500
1346 gallons
This pond can hold up to 1,436.26 gallons of water.
If 20' is the circumference, then the answer is 833.4 gallons.
6015.77 gallons
319.2 gallons for every inch the water in it is deep.
70
how many gallons of water does a swimming pool 15 feet by 4 feet deep hold
1795 gallons, if you fill it to the brim.
It is 30.6 cubic feet = 190.3 Imperial gallons.
821.