SOLUTION: pipe A can fill the tank alone in 5 hrs amd pipe B can fill the tank in 4 hours.A drain pipe (pipe c) can empty the tank in 20hrs/ with all three pipes open, how long it will take

Question 993052: pipe A can fill the tank alone in 5 hrs amd pipe B can fill the tank in 4 hours.A drain pipe (pipe c) can empty the tank in 20hrs/ with all three pipes open, how long it will take to fill the tank?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
pipe A can fill the tank alone in 5 hrs amd pipe B can fill the tank in 4 hours.A drain pipe (pipe c) can empty the tank in 20hrs/ with all three pipes open, how long it will take to fill the tank?
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Each hour:
Pipe A adds 1/5 of a tank
Pipe B adds 1/4 of a tank
Pipe C subtracts 1/20 of a tank
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Can you finish it?
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