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tok1997
Tim can clean a pool by himself in 4 hours. When TIm and John work together, they can clean the pool in 2 hours and 24 minutes. How long would it take john to clean the pool by himself?
Let total work be 1unit given 1/Tim = 4 hours also given 1/Tim+John = 2 Hours 24 min=12/5 hours we need to find out 1/John = 6 hours(solving above two equations)