8.86683 square inches.
(Area=4 X pi X radius squared)
diameter of ball = 1.68 inches.
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Surface area of a sphere = 4*pi*radius2
A Golf Ball
Surface area of a ball or sphere = 4*pi*radius2
Surface area of the ball = 4*pi*342 = 4624*pi square mm
Surface area = 4*pi*162 = 3216.990877 or about 3217 cubic cm