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

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