The diameter would be 7.816 feet.
It is the diameter of a body (eg a sphere) in 3-dimensional space rather than in 2-dimensional space (eg a circle).
Volume of a sphere = 4/3*pi*radius3 Volume (space occupied) = 4/3*pi*103 = 4188.790205 or 4189 cubic cm to 4 sig fig
earth
volume of a sphere (the ball) = 4/3*pi*radius3 volume of box - volume of sphere = space remaining 27 - 4/3*pi*1.53 = 12.86283306 space remaining is about 13 cubic inches
A sphere
A sphere contains the most volume to surface area ratio there is and most things sought that shape when molten.
Volume
A circle, rotated about any diameter, will generate a sphere with the same radius. A circle is the locus of all points in 2-dimensional space that are equidistant from a fixed point. A sphere is the locus of all points in 3-dimensional space that are equidistant from a fixed point.
Space was innitialy sphere.
Its the volume
A 100 (US liquid) gallon cube is 23100 cubic inches. The maximum proportion of a cube which can be filled by spheres, using cubic closed packing or hexagonal close packing is approx 74.05%. Consequently, the spheres can occupy at most 17105 cubic inches. This volume implies a maximum of 335 spheres.You cannot divided the volume of the cube by the volume of each sphere because spheres can never occupy all the space in any shape.
There is no 2D shape that makes a sphere, since a sphere is 3D by definition. The closest thing to a 2D sphere is a circle.