Question
Bryan and Riordan, together, can clean a storeroom in 4 hours. If Bryan is cleaning the storeroom alone, he can only complete the task in 7 hours. How long will Riordan take to clean a storeroom all by himself? Express your answer in mixed number.
3 m

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Bryan and Riordan, together, can clean a storeroom in 4 hours. If Bryan is cleaning the storeroom alone, he can only complete the task in 7 hours. How long will Riordan take to clean a storeroom all by himself? Express your answer in mixed number.