SOLUTION: Two pipes fill the storage tank in 20 min. with both faucets running. If the cold-water faucet runs as fast as the hot water, how long would it take the cold-water faucet to fill t

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Question 377474: Two pipes fill the storage tank in 20 min. with both faucets running. If the cold-water faucet runs as fast as the hot water, how long would it take the cold-water faucet to fill the tub by itself?

I really need help in answering this..
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Practically if you visualise properly you will infer that it will take 40 minutes. double the time since both rates are equal.
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let each fill in x minutes
..
each one does 1/x of the job in 1 minute.
togther they do 1/20 of the job in 1 minute
1/x +1/x = 1/20
..
LCD = x
(1+1)/x = 1/20
2/x= 1/20
cross multiply
2*20 = 1*x
40 = x
each will fillin 40 minutes.
...
m.ananth@hotmail.ca