Question

Approximately how long will it take a jet to travel 400 miles at a rate of 120 miles per hour

Answer 1

We have that the jet will travel 120 miles in an hour, so we have to use a direct rule of three:

$\begin{gathered} 120\text{ miles}\rightarrow1\text{ hour} \\ 400\text{ miles }\rightarrow\text{ ? hours (x)} \\ \Rightarrow x=\frac{(400\text{ miles)(1 hour)}}{120\text{ miles}}=3.3\text{ hours} \end{gathered}$

Therefore, the jet will take 3.3 hours to travel 400 miles, or 3 1/3 hours