A father and his son can clean the house together in 7 hours. When the son
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Mathematics, 05.05.2020 20:14 neather
We
A father and his son can clean the house together in 7 hours. When the son
works alone, it takes him an hour longer to clean than it takes his dad alone.
Find how long it takes the son to clean alone.
![ansver](/tpl/images/cats/User.png)
Answers: 2
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A father and his son can clean the house together in 7 hours. When the son
A father and his son can clean the house together in 7 hours. When the son
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