Question 413477
Molly's rate is:
{{{160/4 = 40}}} pages/hr
Karly's rate is:
{{{100/4 = 25}}} pages/hr
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For Molly:
{{{200/40 = 5}}} (pages) / (pages/hr) = hrs
For Karly:
{{{200/25 = 8}}} (pages) / (pages/hr) = hrs
It would take Karly 3 hours longer to read the book
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{{{7*2 = 14}}}
Each of the 7 could have 2 sandwiches 
with 3 left over