Six big pipes can dry out a pool in 5 hours, whereas eight small pipes can dry out a pool in 10 hours. Time needed to dry out the pool with 3 big pipes and 5 small pipes?

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Six big pipes can dry out a pool in 5 hours, whereas eight small pipes can dry out a pool in 10 hours. Time needed to dry out the pool with 3 big pipes and 5 small pipes?

The needed time is exactly 8 hours and 45minutes