SOLUTION: Please help me with htis word problem. Thanks again! Two water pipes can fill a tank with water in six hours. the larger pipe working alone can fill the tank in 9 hours. How l

Question 34941: Please help me with htis word problem. Thanks again!
Two water pipes can fill a tank with water in six hours. the larger pipe working alone can fill the tank in 9 hours. How long will it take the smaller pipe working alone to fill the tank?
MUST SHOW WORK!
Answer by mbarugel(146) (Show Source): You can put this solution on YOUR website!
Hello!
You might want to see my lesson on this subject.
Let's call X to the number of hours it takes for the smaller pipe to fill the tank when working alone. Applying the formula mentioned in the lesson, you get:

So now we just solve for X:

So the small pipe takes 18 hours to fill the pool.

I hope this helps!
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