Volume of a cylinder = base x height the base is the area of the circle at the bottom.
To find the area of a circle, you use: A = πr² where r is the radius of the circle. radius is half of the diameter, so with a diameter of 12.3, (divide that by 2) the radius of the circle is 6.15 feet.
A = π(6.15)² A ≈ 118.82
Since we know the height is 25 feet, we can solve for the area of the cylinder.
Area of the cylinder = 118.82 x 25 = 2,970.57 feet cubed