Mathematics, 26.02.2021 21:00 dward5823

Erica could do 10 math problems in 20 minutes. Penny could do 15 math problems in 25 minutes. If they worked together, how many minutes would it take Erica and Penny to do 30 math problems?

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Erica could do 10 math problems in 20 minutes. Penny could do 15 math problems in 25 minutes. If the...

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