September 1, 2019, |
Often we can't imagine how many small onions we should cut instead of the big one.
Luckily, we can calculate this using a simple three-dimensional sphere volume formula.
Suppose we have a large onion that has each of 3 dimensions twice the size of the small one.
If the radius r is, for example, 2 cm, then the radius of the large onion 2r is 4 cm.
The volume of a large sphere is always 8 times greater than the volume of a sphere with a half radius r.
Volume of sphere / large onion
Volume of sphere / small onion
- Radius of a large onion
- Radius of a small onion
- Ludolf's number