SOLUTION: You estimate that you can do 12 math problems in 45 min. How long should it take you to do 20 math problems?

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Question 409000: You estimate that you can do 12 math problems in 45 min. How long should it take you to do 20 math problems?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
12/45=20/x
12x=900
x=75 min= 1 hr 15 min