Wait in Line A or Line B to fill your vehicle with gasoline?
An assumption being made is that the hose for the gas pump will reach either side of the vehicle without any problem.
Whichever choice you make, justify your reasoning with mathematics.
Dan Meyer tackled a similar issue here with the shopping cart dilemma.
Want to tweak the numbers? You can have the original, make a copy in your Google Drive, then have at it.