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trent can deliver his newspapers in 30 minutes. it takes lois 20 minutes to do the same route. how long would it take them to deliver the newspapers if they work together? i understand how to do this problem in hours but not minutes...

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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15 minutes.
the book has 12 minutes as the answer....
\[\frac{1}{30} + \frac{1}{20} = \frac1x\]Solve for x to get the time taken if they both do it.

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perfect. thank you, i was putting 30 over 60 to try and get the minutes to hours...
Saifoo.khan is correct. It's basically a rate problem. Trent can deliver at a rate of 1 package/30 minutes, and Lois at the rate of 1 package/20 minutes. You add the rates to get the combined rate. Then take the reciprocal of the resulting rate to get the time required to deliver the package of newspapers. That leads to the formula that Saifoo.khan stated, and when you solve for x you get 12 minutes.
thank you

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