Working alone, Dan can sweep a porch in
15 minutes. Alberto can sweep the same
porch in 11 min...
![subject](/tpl/images/cats/mat.png)
Mathematics, 04.06.2020 19:11 ceeejay0621
Working alone, Dan can sweep a porch in
15 minutes. Alberto can sweep the same
porch in 11 minutes. If they worked
together how long would it take them?
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Answers: 2
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