Question

George read 15 pages in a book in 12 minutes. At this rate, how long will it take him to finish the book if it has 85 pages?

Answer 1

Answer:

Step-by-step explanation:

Set up a ratio in the form of pages/minute:

$\frac{pages}{minute} :$

then fill in next to that how many pages per minute George can read:

$\frac{pages}{minute}:\frac{15}{12}$

Now we want to figure out how long (time is our unknown, so we call that x) it will take him to read 85 pages.  The 85 goes in a ratio on the same line as the other number of pages:

$\frac{pages}{minute}:\frac{15}{12}=\frac{85}{x}$

Cross multiply to get 15x = 1020

Now divide both sides by 15 to get x = 68 minutes, which is an hour and 8 minutes.