Question

Linda's mean speed on her drive home from Cincinnati is 54 mph. If the total trip is 378 miles, how long should she expect the drive to take? Round your answer totwo decimal places, if necessary,

Answer 1

We have that Linda's mean speed is 54 miles per hour. Since the total trip is 378 miles, we have the following rule of three:

`\begin{gathered} 54\text{miles}\rightarrow1h \\ 378\text{miles}\rightarrow x \end{gathered}`

therefore, we have:

`\begin{gathered} x=(378\cdot1)/(54)=7 \\ x=7 \end{gathered}`

Finally, we have that Linda should expect to drive 7 hours.