We want to find the length of the runway given the area and the width.
We can us the formula;
[tex]\begin{gathered} \text{Area}=\text{ Length x Width} \\ \text{rearranged to give } \\ \text{Length = }\frac{Area}{\text{Width}} \end{gathered}[/tex]Inserting the values, we obtain;
[tex]\text{Length = }\frac{1825500}{150}=12170\text{feet}[/tex]