Help with a fraction problem?

Question

after 80 minutes dorothy read 120 pages of a 300 page book, how long will it take her to finish if she reads at the same pace?

Answer 1

Reading pace = 120 pages/80 minutes = 3/2 pages/min
Time to finish = 300 pages/(3/2 pages/min) - 80 minutes already reading = 200 minutes - 80 minutes = 120 minutes

Answer 2

You really have 3 parts to the problem. Fractions are really just division, especially with this problem. First, how fast does Dorothy read (a division question). Second, how many pages does she have left to read (simple subtraction). Last, how long will it take to read the last part (another division).

1. How fast does she read? She read 120 pages in 80 minutes. So, 120 pages/80 minutes = 1.5 pages/minute. Remember this.

2. How much of the book is left? It's a 300 page book, and she's read 120 pages, so:

300 pages - 120 pages = 180 pages left.

3. Dorothy needs to read 180 pages (step two), and we figured she can read 1.5 pages/minute. So:

180 pages / 1.5 pages/min = 120 minutes left!

Answer 3

I believe it is 200 minutes. If Dorothy can read 120 pages in 80 minutes, she can read 240 pages in 160 minutes. We now have 60 more pages to read. 60 is half of 120, and 40 is half of 80. Therefore, 120 + 120 + 60 = 300 pages, and 80 + 80 + 40 = 200. I hope this helps, but shame on you if it is a homework problem.

Answer 4

120 pages in 80 minutes can be reduced to 3 pages every 2 minutes. She has to read another 180 pages.

3/2 = 180/x

x = 120 minutes or 2 hours

Answer 5

Let x denote the time(in minutes) to read 300 pages.
80/120 = x/300
(2/3)(300) = x
200 = x

Answer 6

do a ratio of hours and pages

80:x::120:300
do inner 2 numbers then the 2 outer numbers

120x=24000
x=200minutes

Answer 7

200 minutes

Answer 8

120 minutes or 2hours

Answer 9

200 mins or 3 hours and 20 mins.