SOLUTION: if a tub take 10 min to fill and it takes 12min to drain how long will it take to fill up if the drain was left open ?

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Question 714190: if a tub take 10 min to fill and it takes 12min to drain how long will it take to fill up if the drain was left open ?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
if a tub take 10 min to fill and it takes 12min to drain how long will it take to fill up if the drain was left open ?
Let x = time (minutes) to fill
then
x(1/10 - 1/12) = 1
multiplying both sides by 120:
x(12 - 10) = 120
x(2) = 120
x = 60 minutes