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Q: What is the volume of a sphere with a radius of 21 units?

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V = 38,790 units3

Volume of a sphere = 4/3*pi*radius3 Volume = 12348*pi cubic cm

The radius is 3.34 units.

Surface area = 4*pi*212 = 5541.769 square units to 3 d.p.

If the height is 9 and the volume is 21, then the radius = 0.8618

21/(2*pi) = a radius of about 3.342253805 units

let edge of the cube be {x} radius of the sphere inside the cube= x/2 volume of the cube=x^3 volume the sphere=4pi/3*r^3 =4/3*22/7*r^3/8 ratio of the volume=x^3/11x^3/21 =21/11 ans.= 21:11

A cone, when radius is 4 and height is 21, has a volume of 351.86 units3

A circle with a radius of 21 units has an area of 1,385.44 square units.

A circle with a radius of 21 units has a circumference of 131.95 units.

Using 3.14 as Pi the area of circle is: 1384.74

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