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Solve the problem. Bob can overhaul a boat's diesel inboard engine in 30 hours. His apprentice takes 60 hours to do the same job. How

Solve the problem. Bob can overhaul a boat's diesel inboard engine in 30 hours. His apprentice takes 60 hours to do the same job. How long would an overhaul take with them working together? Question 9Select one: A. 12 hrs B. 20 hrs C. 8 hrs D. 90 hrs

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