TeX source:
\begin{array}{rcl} U &=& 2\cdot 230 \, cm + 2\cdot \sqrt{197.100} \, cm \cr U &=& 460 \, cm + 60\cdot \sqrt{219} \, cm \cr U &\approx& 1.347{,}92 \, cm \cr U &\approx& 13{,}48 \, m \end{array}