$ \text{Gegeben:}\\\text{Mantelfläche} \qquad M \qquad [m^{2}] \\ \text{Grundfläche} \qquad G \qquad [m^{2}] \\ \\ \text{Gesucht:} \\\text{Oberfläche} \qquad O \qquad [m^{2}] \\ \\ O = G +M \\ \textbf{Gegeben:} \\ M=4m^{2} \qquad G=6m^{2} \qquad \\ \\ \textbf{Rechnung:} \\ O = G +M \\ M=4m^{2}\\ G=6m^{2}\\ O = 6m^{2} + 4m^{2}\\\\ O=10m^{2} \\\\\\ \small \begin{array}{|l|} \hline M=\\ \hline 4 m^2 \\ \hline 400 dm^2 \\ \hline 4\cdot 10^{4} cm^2 \\ \hline 4\cdot 10^{6} mm^2 \\ \hline \frac{1}{25} a \\ \hline 0,0004 ha \\ \hline \end{array} \small \begin{array}{|l|} \hline G=\\ \hline 6 m^2 \\ \hline 600 dm^2 \\ \hline 6\cdot 10^{4} cm^2 \\ \hline 6\cdot 10^{6} mm^2 \\ \hline \frac{3}{50} a \\ \hline 0,0006 ha \\ \hline \end{array} \small \begin{array}{|l|} \hline O=\\ \hline 10 m^2 \\ \hline 10^{3} dm^2 \\ \hline 10^{5} cm^2 \\ \hline 10^{7} mm^2 \\ \hline \frac{1}{10} a \\ \hline 0,001 ha \\ \hline \end{array}$