SOLUTION: Darla can was and detail 3 cars in 2 hours. Larry can wash and detail the same 3 cars in 1.5 hours. About how long will it take to wash and detail the 3 cars if Darla and Larry wor

Question 119332: Darla can was and detail 3 cars in 2 hours. Larry can wash and detail the same 3 cars in 1.5 hours. About how long will it take to wash and detail the 3 cars if Darla and Larry worked together?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Washing and detailing the 3 cars can be considered 1 job, since that
is all the problem is interested in.
(1 job / 2 hrs) + (1 job / 1.5 hrs) = 1 job / k hrs

multiply both sides by 3

hrs

Working together, they can do the job in 51 min 25 sec approximately
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