so, it takes 1 hour, or 60 minutes, to travel 55 miles, how many minutes does it take for 310?
[tex]\bf \begin{array}{ccll}
miles&minutes\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
55&60\\
310&m
\end{array}\implies \cfrac{55}{310}=\cfrac{60}{m}\implies m=\cfrac{310\cdot 60}{55}[/tex]
