[tex]\begin{gathered} \text{The scale is equal to }\Rightarrow3in=2ft \\ \text{The length of the model is}\Rightarrow6in \\ The\text{ actual length } \\ \Rightarrow6\frac{1}{2}in=\frac{13}{2}in \\ \Rightarrow6\frac{1}{2}in=\frac{13}{2}\times\frac{2}{3} \\ \Rightarrow\frac{13}{3}ft=4\frac{1}{3}ft \\ So,\text{ the actual length is 4}\frac{1}{3}ft. \end{gathered}[/tex]
