\\ b=2 \pi \sqrt[3]{36/ \pi^2 }" alt="V= \frac{4}{3} \pi R^3=8 \\ \pi R^3=6 \\ R= \sqrt[3]{6/ \pi } \\ S=4 \pi R^2=4 \pi \sqrt[3]{36/ \pi^2 } \\ S_{tkani}=ab=a*2=4 \pi \sqrt[3]{36/ \pi^2 } => \\ b=2 \pi \sqrt[3]{36/ \pi^2 }" align="absmiddle" class="latex-formula">