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Carmen drove 240 miles using 9 gallons of gas. At this rate, how many gallons of gas would she need to drive 216 miles? gallons

User Sagar Khatri
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1 Answer

14 votes
14 votes

We are given that 240 miles are driven using 9 gallons of gas. To determine the gallons of gas needed to drive 216 miles we use a rule of three like this:


\begin{gathered} 240mi\rightarrow9gal \\ 216mi\rightarrow x \end{gathered}

Now, we cross multiply:


(240mi)x=(216mi)(9gal)

Now, we divide both sides by 240 mi:


x=((216mi)(9gal))/(240mi)

Now, we solve the operations:


x=8.1gal

Therefore, 8.1 gallons are needed.

User Caspar Wylie
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3.1k points
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