SOLUTION: 22. Two pumps of different sizes, working together, can empty a fuel tank in 5 hours. The larger pump can empty this tank in 4 hours less time than the smaller. If the larger pum

SOLUTION: 22. Two pumps of different sizes, working together, can empty a fuel tank in 5 hours. The larger pump can empty this tank in 4 hours less time than the smaller. If the larger pum

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Question 344530: 22. Two pumps of different sizes, working together, can empty a fuel tank in 5 hours. The larger pump can empty this tank in 4 hours less time than the smaller. If the larger pump is out of order, how long will it take the smaller one to do the job alone?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
(fraction done by larger pump) + (fraction done by smaller pump) = (whole task)

[5 / (s - 4)] + (5 / s) = 1
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