The surface area of a sphere with a 24 inch diameter is 1809.6 square inches = 12.6 sq feet
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Square footage (surface area) of a 36 inch diameter sphere = 4pir2 pi = 3.1416 r = 1/2 X diameter You asked for square footage; so first convert 36 inches to feet 36 inches / 12 inches/foot = 3 feet r = 1/2 X 3 feet = 1.5 feet surface area = 4 X 3.1416 X (1.5 feet)2 = 28 square feet
A 2-inch diameter sphere has a volume of 4.189 cubic inchesA 1-inch diameter sphere has a volume of 0.5236 cubic inches.
13.6354 square feet (rounded)
0.76 sq ft.
33.51 cubic inches for a 4-inch diameter sphere.