1.9 and the diameter is ten
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Circumference of a circle = pi*diameter or 2*pi*radius
Easy to do. Just divide the circumference by Pi (about 3.1416) to determine the diameter:61.89 / 3.1416 = about 19.7 diameter
Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 21.67698931 or 21.7 meters to the nearest tenth
diameter*pi = circumference
Diameter = circumference/pi