I have a 12' above ground round pool that is fillable up to about 29 inches and it holds roughly about 1600 gallons so yours will probably hold more than 2000 gallons.
About 3,758 gallons.
Surface area for a circle is pi * radius squared If the diameter is 25 feet, then the radius is 12.5 feet, and the square footage is pi * 12.5 * 12.5 Or about 491 square feet
The square footage of a 25,000 gallon pool depends on the shape of the pool. To determine the square footage multiply the floor width with the floor length. Multiply the length by the height of the walls for each wall. Add all these numbers together to get the square footage.
Radius squared times pi 12X12=144X3.14=452.16 452 sq. ft.
40 sq ft
The surface area of a 21 foot in ground pool is 346.36 square feet.
The base of the pool is a circle with a diameter of 18 ft. The radius is 9 ft. The area of the circle is (pi) times (R2) = 81pi = 254.47 square feet (rounded to 2 decimal places))
If the cicumference is 10 feet:- Then radius = 10/(2*pi) = 1.591549431 feet Area = pi*1.5915494312 = 7.957747155 or 7.958 square feet rounded to 3 decimal places
If it is a rectangular pool, then multiply the length by the width. If it is a circular pool then the surface area = (Pi/4)*(diameter^2)
72 square feet (18 feet times 4 feet)