Roughly 78
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The total surface area will be approximately 87.96 feet2
Surface area of a sphere: A = 4πr2So, surface area = 4pi52
Area equals pi times the radius squared.
Area of a circle equals pi r2 Therefore the radius of a circle equals the square root of (area divided by pi).
A circle with a radius of 5.1 inches has an area of 81.71 square inches.