Anew type of pump can drain a certain pool in
10
hours. an older pump can drain the poo...
![subject](/tpl/images/cats/mat.png)
Mathematics, 27.09.2019 22:30 samuelmarchettp9i3sa
Anew type of pump can drain a certain pool in
10
hours. an older pump can drain the pool in
15
hours. how long will it take both pumps working together to drain the pool?
![ansver](/tpl/images/cats/User.png)
Answers: 2
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