SOLUTION: Two inlet pipes can fill an empty swimming pool in 3 days and 6 days, respectively. A pump can empty a full pool in 4 days. How long will it take to fill the empty pool if both pi
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Question 799694: Two inlet pipes can fill an empty swimming pool in 3 days and 6 days, respectively. A pump can empty a full pool in 4 days. How long will it take to fill the empty pool if both pipes are open and the pump is on?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Two inlet pipes can fill an empty swimming pool in 3 days and 6 days, respectively.
A pump can empty a full pool in 4 days.
How long will it take to fill the empty pool if both pipes are open and the pump is on?
:
let t = time required to fill the pool in this situation
let the full pool = 1
:
+ - = 1
Multiply by 12 to get rid of the denominators, results:
4t + 2t - 3t = 12
3t = 12
t = 12/3
t = 4 days to fill the pool
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