Circumference of a circle = (pi) x Diameter
Diameter = 2 x radius
Circumference = (pi) x (2 x radius)
(2 x radius) = Circumference/pi
Radius = Circumference/(2 x pi) ==> Over to you.
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I'm not sure what you mean. If the radius is 5, the circumference is 10pi. (about 31 and a half) If the circumference is 5, the radius is 5 divided by 2pi. (about four fifths)
No. diameter = 2 x radius ⇒ radius = diameter ÷ 2 If the radius is 14 ft the diameter is 2 x 14 ft = 28 ft If the diameter is 7ft the radius is 7 ft ÷ 2 = 31/2 ft.
Circumference = Diameter*pi So diameter = Circumference/pi = 32*pi/31 = 32
There are 6 miles in 31,680 feet
Volume = pi*142*31 = 19088.317 cubic units rounded to 3 decimal places