SOLUTION: 13. Molly read 160 pages in her book in 4 hours. Her sister Karly took 4 hours to read 100 pages in the same book. If the book is 200 pages long and if the two girls continued to

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: 13. Molly read 160 pages in her book in 4 hours. Her sister Karly took 4 hours to read 100 pages in the same book. If the book is 200 pages long and if the two girls continued to      Log On

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Question 413477: 13. Molly read 160 pages in her book in 4 hours. Her sister Karly took 4 hours to read 100 pages in the same book. If the book is 200 pages long and if the two girls continued to read at these rates, how much longer would it take Karly to read the book than Molly?
11. There were 17 sandwiches for 7 people on a picnic. How many whole sandwiches were there for each person if they were divided equally? How many were left over?



Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Molly's rate is:
160%2F4+=+40 pages/hr
Karly's rate is:
100%2F4+=+25 pages/hr
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For Molly:
200%2F40+=+5 (pages) / (pages/hr) = hrs
For Karly:
200%2F25+=+8 (pages) / (pages/hr) = hrs
It would take Karly 3 hours longer to read the book
--------------------
7%2A2+=+14
Each of the 7 could have 2 sandwiches
with 3 left over