SOLUTION: A tank can be filled by one inlet pipe in 15 minutes. It takes an outlet pipe 75 minutes to drain the tank. If the outlet is left open, how long would it take to fill the tank?
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Question 472818: A tank can be filled by one inlet pipe in 15 minutes. It takes an outlet pipe 75 minutes to drain the tank. If the outlet is left open, how long would it take to fill the tank?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A tank can be filled by one inlet pipe in 15 minutes. It takes an outlet pipe 75 minutes to drain the tank. If the outlet is left open, how long would it take to fill the tank?
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1/15 tank is filled per minute
1/75 tank is drained per minute
Net gain = 1/15 - 1/75 = 4/75 per minute
--> 75/4 minutes per tank
= 18.75 minutes
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