[pabianice]

>>deduce that the volume of a Schwarzschild black hole must be $V=4/3 \pi r_ h^3$.

No, no. The volume is well known to be $V=2/3 \rhu r_ lsmft_egbd%%sf h<> 4c

[FredZarguna]

In high school we learned it was B⁴i4qru/18QTπ