To find height $ h $ use formula:
$$ V = h ^{ 2 } \cdot r \cdot \pi$$After substituting $V = 250.9\, \text{cm}$ and $r = 3.2\, \text{cm}$ we have:
$$ 250.9\, \text{cm} = 3.2\, \text{cm} \cdot h ^{ 2 } \cdot \pi $$$$ h ^{ 2 } = \dfrac{ 250.9\, \text{cm}}{ 3.2\, \text{cm} \, \pi } $$$$ h ^{ 2 } \approx 24.9574 $$$$ h \approx \sqrt{ 24.9574 } $$$$ h \approx 4.9957 $$