When it comes to finding the area of spaces, you must determine its shape. In this case, the shape of the pool is a square. From there, we will use the formula to find the area of a square.
Area = (side)^2
Since the square of the square's side is its total area, then if vice versa, we have to find the square root of the area to find the length. Thus,
Length = √150 = 5√6 = 12.25 ft