SOLUTION: how would i figure out this word problem : Erika read 90 pages in 2 1/2 hours. At the same time, how many hours would it take her to read 225 pages?

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Question 192636: how would i figure out this word problem : Erika read 90 pages in 2 1/2 hours. At the same time, how many hours would it take her to read 225 pages?
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!


By Ratio & Proportion:

Let "x" = number of hours in reading 225 pages.

So,
90pages%2F2.5hrs=225pages%2Fred%28x%29
Cross multiply
red%28x%29%2A90=2.5%2A225=562.50hrs
red%28x%29cross%2890%29%2Fcross%2890%29=cross%28562.50%296.25%2Fcross%2890%29
red%28x=6.25hrs%29, or 6 hrs & 15 minutes (Answer)


Thank you,
Jojo