SOLUTION: John can build pegpin twice as fast as Ruel.working together,it takes them 5hours .How long would it have taken John working alone?
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Question 1167051: John can build pegpin twice as fast as Ruel.working together,it takes them 5hours .How long would it have taken John working alone? Answer by ikleyn(52914) (Show Source):
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John can build pig-pen twice as fast as Ruel. Working together, it takes them 5 hours.
How long would it have taken John working alone?
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It means that in 5 hours, John makes of the job.
Hence, it will take John 2.5 hours to make of the job.
Therefore, John can complete the entire job in 3*2.5 hours = 7.5 hours = 7 hours and 30 minutes working alone ANSWER
