Area:
A = pi x r2
A = 3.14 x (8m)2
A = 200.96m2
Circumference:
C = 2 x pi x r
C = 2 x 3.14 x 8m
C = 50.24m
Circumference = 2*pi*r = 50.265 metres
The circumference is approximately 50.27m (C = 2*Pi*r)
4m
C = (Pi)(diameter) C = 25.1 meters
150.796 m2 (rounded)
Circumference = 2*pi*r = 50.265 metres
The circumference is approximately 50.27m (C = 2*Pi*r)
Approximately 50.26m, because circumference is equal to diameter times pi (or 3.1415). Or twice the radius times pi.
Area = 201 m2
4m
The formula for the area of a circle is A = pi*r2, where r is the radius of the circle. So, plugging r = 8m into the formula gives: A = pi*82 = pi*64 This is approximately 201.06193 square meters.
C = (Pi)(diameter) C = 25.1 meters
You multiply the diameter by Pi (about 3.1416). The result is the circumference:8m x 3.1416 = 25.1328 meters circumference
150.796 m2 (rounded)
If 8m is its radius then the volume of the sphere is: 4/3*pi*8^3 = 2145 cubic m rounded
It is not clear from the question what the two measures refer to and which is which: the radius or diameter of the base, and the height.
If that's the radius, use the standard formula for the volume of a sphere.If that's the diameter, divide it by 2 to get the radius; then you can use the standard formula for the volume of a sphere.