Mathematics, 06.04.2020 02:12 interndon

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.

Answers: 3

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We
A father and his son can clean the house together in 7 hours. When the son
works alon...