SOLUTION: An inlet pipe can fill a water tank in 10hours, while an outlet pie can empty the same tank in 15 hours. By mistake, both pipes are left open. How long will it take to fill the wat

Question 451155: An inlet pipe can fill a water tank in 10hours, while an outlet pie can empty the same tank in 15 hours. By mistake, both pipes are left open. How long will it take to fill the water tank with both pipes open.
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
An inlet pipe can fill a water tank in 10hours, while an outlet pie can empty the same tank in 15 hours. By mistake, both pipes are left open. How long will it take to fill the water tank with both pipes open.
Let x = time (hours) it will take to fill tank
then
x(1/10 - 1/15) = 1
x(15 - 10) = 150
x(5) = 150
x = 30 hours

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