Question
Paul and Billy, together, can clean a hut in 5 hours. If Paul is cleaning the hut alone, he can only complete the task in 7 hours. How long will Billy take to clean a hut all by himself? Express your answer in mixed number.
3 m

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Paul and Billy, together, can clean a hut in 5 hours. If Paul is cleaning the hut alone, he can only complete the task in 7 hours. How long will Billy take to clean a hut all by himself? Express your answer in mixed number.