It will be bigger than if the radius were 20 mi and smaller than if it were 22 mi.
The area of a circle of radius 21 is 1386
21/(2*pi) = a radius of about 3.342253805 units
If the height is 9 and the volume is 21, then the radius = 0.8618
A circle with a radius of 21 inches has a circumference of 131.95 inches.
Circumference: 14*pi mi Area: 49*pi square mi
The perimeter of a cirlcle is its circumference which is: 2*pi*radius or diameter*pi
If the area is a circle and the radius of the circle is 21 miles, the distance around the circle (circumference) is 131.95 miles. The area of that circle is 1,385.4 square miles.
If radius=21 ft, then diameter = 2*radius = 42 ft
The area of a circle of radius 21 is 1386
21/(2*pi) = a radius of about 3.342253805 units
area circle = π × radius² = π × (400 miles)² = 160000π sq mi ≈ 502655 sq mi
If the height is 9 and the volume is 21, then the radius = 0.8618
A circle with a radius of 21 inches has a circumference of 131.95 inches.
Circumference: 14*pi mi Area: 49*pi square mi
The volume of a sphere with a radius of 21 units is: 12,348 units 3
A circle with a radius of 21 meters has a circumference of 131.95 meters.
The radius is 3.34 units.