It is: 4*pi*62 = 452.389 square feet to three decimal places
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The surface area is 2,124 square feet.
1356.48 sq mt Another answer in square feet is : The formula for the surface area of a sphere is 4 x pi x radius squared. The radius is half the diameter, or 3 feet. The radius squared is therefore 9 square feet. The surface area is then 4x3.1415x9 square feet or 113.09 square feet.
The surface area of a sphere is (4 pi) x (radius of the sphere)-squared.We're not completely sure of what a "90' sphere" is. If you're saying that thesphere's diameter is 90-ft, then its radius is 45-ft, and its surface area is(4 pi) x (45-ft)-squared = 25,446.9 square feet, or 2,827.4 square yards. (both rounded)
The surface area is 2,123.7 ft2
Your sphere will have a surface area of about 201 square feet. The formula for finding the surface area (As) of a sphere is 4 times pi times the radius (r) squared, or this: As = 4 x pi x r2 That's As = 4 x 3.14 x 42 = 201.0619298 square feet. A link can be found for more information.