SOLUTION: Two pipes fill a storage tank in 9 hours. The larger pipe fills the tank three times as fast as the smaller one. How long would it take the larger pipe to fill the tank alone?

Question 968957: Two pipes fill a storage tank in 9 hours. The larger pipe fills the tank three times as fast as the smaller one. How long would it take the larger pipe to fill the tank alone?
Answer by dkppathak(439) (Show Source): You can put this solution on YOUR website!
Two pipes fill a storage tank in 9 hours. The larger pipe fills the tank three times as fast as the smaller one. How long would it take the larger pipe to fill the tank alone?
let smaller pipe take 3x hrs to fill the tank and big take x hours
big one hours =1/x and other 1 hours =1/3x
both pipe together in 1 hours = 1/x+1/3x=4/3x hours
as per given conditions both pipe fill up tank in 1 hours =1/9
4/3x=1/9 by cross multiplication
36=3x
X=12 hours
answer 12 hours
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