An answer is impossible because there are no cubic units within a circle but only square units
803.84 is the volume in cubic ft when using 3.14 as pi.
What you have there isn't actually a circle, but a stubby pillbox of a "cylinder".Volume of a cylinder = (pi) (R2) (H) = (pi) (15.5)2 (2) = 1,509.54 cubic inches (rounded)
4 inches = 0.1016 metres. So volume = pi*r2*h = pi*(17/2)2*0.1016 = 23.1 cubic metres (approx)
The US one-cent coin is 0.750 inches in diameter and 0.061 inches thick,for a volume of 0.027 cubic inches.The UK plated-steel penny (one new pence) is 20.32 mm in diameter and 1.65 mm thick, for a volume of 0.535 cm3 or about 0.033 cubic inches.(see related question)
An answer is impossible because there are no cubic units within a circle but only square units
803.84 is the volume in cubic ft when using 3.14 as pi.
What you have there isn't actually a circle, but a stubby pillbox of a "cylinder".Volume of a cylinder = (pi) (R2) (H) = (pi) (15.5)2 (2) = 1,509.54 cubic inches (rounded)
4 inches = 0.1016 metres. So volume = pi*r2*h = pi*(17/2)2*0.1016 = 23.1 cubic metres (approx)
The US one-cent coin is 0.750 inches in diameter and 0.061 inches thick,for a volume of 0.027 cubic inches.The UK plated-steel penny (one new pence) is 20.32 mm in diameter and 1.65 mm thick, for a volume of 0.535 cm3 or about 0.033 cubic inches.(see related question)
Area of the circle = pi R2 = (225 pi) square feetVolume = (225 pi) x (0.25) cubic feet1 cubic yard = 27 cubic feetVolume = (225 pi) / (4 x 27) = 6.545 cubic yards (rounded)
Total coverage area 314.16 sq. feet. depth of 2 inches = 1.94 cu yards answer ... around 2 cu yards
A 10-foot round slab at 4 inches requires 1 cubic yard.
I assume the 22 foot refers to the diameter of the circle. the area of the circle is pi x radius squared. area = 3.14 x 11 x 11 = 380 sq ft 3 in = 1/4 ft so 380 / 4 = 95 cubic ft 95 / 27 = about 3.5 cubic yards
To measure the concrete needed for a circular pad:-- Decide how thick (deep) the pad is to be. If it's in inches, divide by 12 for thickness in feet.-- Measure either the circumference or the diameter of the circle, in feet.-- If you measured the circumference, then the cubic yds of concrete needed is(0.00295) x (circumference) x (circumference, again) x (thickness) ... all in feet-- If you measured the diameter, then the cubic yds of concrete needed is(0.0291) x (diameter) x (diameter, again) x (thickness) ... all in feet
Volume = pi * r2 * h = pi * (21/6)2 * (6/36) since 21 foot diameter = 21/2 foot radius = 21/6 yard radius and 6 inches = 6/36 yards so volume = 6.414 cu yards.
Apples and oranges. Without knowing how thick the 450 sq. ft. area is or how thick you want it to be you can't convert to cubic yards. A cubic yard has 27 cubic feet. One square foot 3 inches thick would be 1/4 cubic feet. 4 sq. ft. 3 inches thick would be 1 cubic foot. 450 sq. ft. 3 inches thick is 112 1/2 cubic feet or just a bit over 4 cubic yards. 450 sq. ft. 4 inches thick is 150 cubic feet or 5 1/2 cubic yards.