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Question

Ben can complete 3 math problems in 20 minutes. If he continues working at the same rate, how long will it take Ben to complete 15 math problems?
14 years ago

Answers

Ms. Sue
15/3 = 5

It will take him 5 times 20 minutes to finish.

You could also set up a proportion. Cross multiply and solve for x.

3/20 = 15/x

14 years ago

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