01-03-2015
Mathematics

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Please help!!!! Hannah can paint a room in 9 hours. Destiny can paint the same room in 15 hours. How long does it take for both Hannah and Destiny to paint the room it they are working together?

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Аноним Аноним

01-03-2015

9/2= 4.5
15/2= 7.5
4.5+7.5=12

12 Hours

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