d = 1.59 inches
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About 1.6 inches.
5 pi in or 15.7 in
The equation for determining the circumference of a circle is circumference = pi x diameter. So if the diameter is 5, then the circumference is pi * 5 = 15.71
pi*diameter = 16 inches Divide both sides by pi to find the diameter: diameter = 5.092958179 or 5 inches to the nearest inch.
A circle with radius of 3 inches doesn't have a diameter of 10 inches. If the radius is 3, then the diameter is 6, and the circumference is (6 pi) = 18.85 . (rounded) If the diameter is 10, then the radius is 5, and the circumference is (10 pi) = 31.42 . (rounded) The diameter is always double the radius, and the radius is always half of the diameter.