Answer:
27,000 feet
Step-by-step explanation:
Let [tex]x[/tex] be the actual length of the pipeline, in feet.
Set up the following proportion:
[tex]\displaystyle\\\frac{1}{2,000}=\frac{13.5}{x}[/tex]
Cross-multiplying yields [tex]x=13.5\cdot 2,000=\boxed{27,000\text{ ft}}[/tex]