How many yards of top soil will fill a 24 ft round circle?

To calculate the amount of topsoil needed to fill a 24-foot round circle, first determine the area of the circle using the formula (A = \pi r^2). The radius is 12 feet (half of 24 feet), so the area is approximately (3.14 \times 12^2 \approx 452.39) square feet. If you want to fill it to a depth of 1 foot, you would need about 452.39 cubic feet of topsoil, which is equivalent to about 16.74 cubic yards (since there are 27 cubic feet in a cubic yard).