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When Ruby works out, she spends 2 minutes stretching for every 15 minutes of exercise. If Ruby spends 15 minutes stretching, how long did she spend exercising?

User LordGrim
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1 Answer

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The ratio of time spend for stretching to time spend for exercise remain same.

Equate the ratio of time spend for stretching to time spend for exercise in both cases.


\begin{gathered} (2)/(15)=(15)/(x) \\ x=(15\cdot15)/(2) \\ =112.5 \end{gathered}

So Ruby spend 112 and a half minute to spend 15 minutes in stretching.

So answer is 112.5 min or


112(1)/(2)

User AllTwentyQuestions
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