35 feet.
Circumference is simply pi times the diameter. The approximate value of pi is 3.14, so for a circle 4 feet in diameter, the circumference is 4 x 3.14 = 12.56 feet, approximately.
Assuming 30 feet is the diameter, its 94.2ft
The diameter of a circle with a 48 feet circumference is: 15.28 feet (circumference divided by Pi = diameter).
The circumference of a circle with a diameter of nine feet is: 28.27 feet (diameter x Pi = circumference).
The circumference of a circle with a diameter of 20 feet is: 62.83 feet (diameter x Pi = circumference).
If a circle has a diameter of 21 feet the circumference is: 65.97 feet (diameter x Pi = circumference).
If the circumference of a circle is 20 feet the diameter is: 6.366 feet (circumference divided by pi = diameter).
A circle with a diameter of 9 feet has a circumference of about: 28.27 feet (diameter x Pi = circumference).
The circumference of a circle with a diameter of 50 feet is about 157.1 feet. (diameter x Pi = circumference).
The circumference of a circle with a diameter of 6 feet is about 18.85 feet.
If a circle has a circumference of six feet its diameter is 1.91 feet.
If the circumference is 8 feet, the diameter of the circle is: 2.55 feet.