Scale model train: 14.2 cm
Scale factor:
[tex]\beta=\frac{87m}{1cm}[/tex]The actual train length of the train can be calculated using the formula:
[tex]L_{train}=L_{\text{ scale train}}\cdot\beta[/tex]Then:
[tex]\begin{gathered} L_{train}=14.2cm\cdot\frac{87m}{1cm} \\ \therefore L_{train}=1235.4m \end{gathered}[/tex]