I assume you are asking how much time has passed
now, we can set up a proportion with this:
let x = time(in hours)
[tex] \frac{120miles}{50miles} = \frac{x}{1 hour} [/tex]
we cross multiply to get:
[tex]50x=120[/tex]
divide both sides by 50 to get:
[tex]x= \frac{120}{50} =2.4= \frac{12}{5}=2 \frac{2}{5}[/tex] hours
