Sphere Volume.

[jebem]

Hi, Gérard,

Well, I forgot almost mt math after so much brain damage caused by good life and drinks... .)

Let me try:

V = 4/3 * PI * R^3

Also, we know that D = 2 * R; then R = D/2

If we replace R for D/2 in the initial equation, we get:
V = 4/3 * PI * (D/2)^3

which can also be written as:
V = 4/3 * PI * D^3 / 2^3

Or:
V = 4/3 * PI * D^3 / 8

Or:
V = 4/(3 * 8) * PI * D^3

Or:
V = 4/24 * PI * D^3

Or:
V = 1/6 * PI * D^3

Or:
V = (PI * D^3)/6