SOLUTION: One pump takes 4 hours to fill up 20 gallons, another takes 5 hours to fill 20 gallons .If the two pumps work together, how many gallons will they fill in 8 hours?
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Question 449153: One pump takes 4 hours to fill up 20 gallons, another takes 5 hours to fill 20 gallons .If the two pumps work together, how many gallons will they fill in 8 hours? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Add the rates to get combined rate of filling
Multiply both sides by
The will fill 72 gallons in 8 hours working together
