SOLUTION: The time required to fill a pool with a water hose is 30 hours. Using a pump the pool can be filled in 10 hours. How long will it take to fill the pool using a pump and 2 hoses?

Question 187064: The time required to fill a pool with a water hose is 30 hours. Using a pump the pool can be filled in 10 hours. How long will it take to fill the pool using a pump and 2 hoses?
In the pool problem above how long would it take to fill the pool if the drain, which could drain the pool in 15 hours, is left open?
I have the first part figured out but I am struggling with the second part. If you could just set up the table for me that would be great! Thanks!
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The time required to fill a pool with a water hose is 30 hours. Using a pump the pool can be filled in 10 hours. How long will it take to fill the pool using a pump and 2 hoses?
;
Let t = time required when two hoses and a pump are used
Let full pool = 1
:
+ = 1
;
In the pool problem above how long would it take to fill the pool if the drain, which could drain the pool in 15 hours, is left open?
:
Same thing but subtract for the drain
+ - = 1

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