SOLUTION: John and Mary operate wood splitters for fireplace wood. John's machine can split a pile of wood in 4 days. Mary can do the same in 3 days. They work 8h/d. How long will it take th
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Question 1097553: John and Mary operate wood splitters for fireplace wood. John's machine can split a pile of wood in 4 days. Mary can do the same in 3 days. They work 8h/d. How long will it take them to split the pile of wood using both machines? Answer by ikleyn(53765) (Show Source):
John's machine makes of the job per day.
Mary's machine makes of the job per day.
Working together they make + = of the job per day.
Hence, it will take of the day to complete the job working together.
of the day = = hours.
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It is a typical joint work problem.
