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The diameter is 1.68 inches or greater. The circumference can be found from ordinary principles of geometry. The formula for a the circumference is: C = πd So the circumference of a golf ball would be 5.2779 (to 4 decimal places)
pi
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Let's assume that your golf ball is 1.680 inches in diameter - the smallest size golf ball allowed in certain golfing associations. Then we know that the circumference of the golf ball will be the distance it would roll in one complete rotation. Circumference = pi * diameter Circumference = 3.14 * 1.680 in Circumference = 5.2752 inches = the distance that this particular golf ball would roll
circumference = 5*pi = 15.70796327 or 15.708 cm rounded to 3 d.p.