SOLUTION: Jeff and Kirk can build a 75-ft retaining wall together in 7 hours. Because Jeff has more experience, he could build the wall by himself 3 hours quicker than Kirk. How long
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Question 1145944: Jeff and Kirk can build a 75-ft retaining wall together in 7 hours. Because Jeff has more experience, he could build the wall by himself 3 hours quicker than Kirk. How long would it take Kirk (to the nearest minute) to build the wall by himself? Answer by ikleyn(52790) (Show Source):