SOLUTION: If you can do 12 math problems in 45 minutes. How long should it take you to do 20 math problems.

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Question 703585: If you can do 12 math problems in 45 minutes. How long should it take you to do 20 math problems.
Answer by ptaylor(2198) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=amount of time it takes to do 20 math problems
If you can do 12 math problems in 45 min, you work at the rate of 12/45 of a math problem per min. So our equation to solve is:
(12/45)*x=20
x=20(45/12)=(5/3)*45=75 min---ans
CK
(12/45)*75=20
20=20
Hope this helps---ptaylor