SOLUTION: John and Sam have a lawn mowing service. At one home, John can mow the lawn by himself in 2 hours, but it takes Sam 2.5 hours. How many hours t will it take them to mow the same la
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Question 1158819: John and Sam have a lawn mowing service. At one home, John can mow the lawn by himself in 2 hours, but it takes Sam 2.5 hours. How many hours t will it take them to mow the same lawn together?. Answer by ikleyn(52767) (Show Source):
Working alone, John makes = 0.5 of the job per hour
Working alone, Sam makes = = 0.4 of the job per hour.
Working together, they make 0.5 + 0.4 = 0.9 of the job per hour.
It means that they complete the job in hours = 1 hours = 1 hour, 6 minutes and 40 seconds. ANSWER
