The area of a circle with a diameter of 18 feet can be calculated by:
A=pie x r x r . So, in this case A = 3.14 x 9 * 9= 255 square feet. If you know how many square feet are in a roll of sod, you can find your answer.
Area = 254 square feet.
0 so long as there is no thickness
Divide your answers by 2Then divide by 3.14Then multiply your answer by 2
24 feet - you answered your own question !
circle diameter minus center of pitch cirlce raius