4ft.
The circumference of a circle with a diameter of 4 feet is about 12.57 feet. (C = d x Pi).It is 4 pi feet, or about 12.57 feet.
4 feet. The radius is half the diameter.
The area of a hole 4 feet in diameter and 19 feet deep is: 76 square feet. (4 x 19 = 76).
The circumference of the circle that has a diameter of 4 feet is: 12.57 feet
The volume of a cone 4 feet high with a base diameter of 13 feet is: 177 cubic feet.
A cylinder with a diameter of 2 feet and a length of 4 feet has a volume of 12.57 cubic feet.
Along the diameter, exactly 4 of them.
A 4-inch diameter pipe that is 3,000 feet long has a volume of: 261.8 cubic feet.
12.56 square 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.
The volume of a cylinder 4 feet in diameter by 30 feet long is: 376.99 cubic feet.
4*pi = 12.6 cubic feet.