The old duplicator could produce an issue
of the newsletter in 2 hours. The new one
take...
![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 24.05.2020 11:57, 130004979
The old duplicator could produce an issue
of the newsletter in 2 hours. The new one
takes 40 minutes. How long will it take it
both machines are used?
![answer](/tpl/images/cats/otvet.png)
Answers: 2
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