The answer from all three agents was:

Yes, to my knowledge there is a formula that contains the radius ( r_2 ):

[
= \frac{\pi}{3} \cdot h \cdot \left( {r_{1}}^{2} + \frac{r_{1}}{\left( \frac{1}{r_{2}} - \frac{1}{r_{1}} \right)} - \frac{{r_{2}}^{2}}{r_{1} \cdot \left( \frac{1}{r_{2}} - \frac{1}{r_{1}} \right)} \right)
]

The answer was considered correct because this is the representation of the TeX formula. This is therefore a problem in the representation and not in the recording and answering.