SOLUTION: A large and small drain are opened to drain a pool.The large drain can empty the pool 6 hours. After both drains have been opened for 1 hour, the large drain clogs and is closed.Th

Algebra ->  Rate-of-work-word-problems -> SOLUTION: A large and small drain are opened to drain a pool.The large drain can empty the pool 6 hours. After both drains have been opened for 1 hour, the large drain clogs and is closed.Th      Log On


   

Question 352697: A large and small drain are opened to drain a pool.The large drain can empty the pool 6 hours. After both drains have been opened for 1 hour, the large drain clogs and is closed.The smaller drain remains open and requires 9 h more to empty the poole. How long would it take the small drain,working alone to empty the pool?
Hope you can help! I am really confused with this one.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
in the 1 hour that it is open , the large drain empties 1/6 of the pool

it takes the small drain 10 hours to empty 5/6 of the pool

so it would take ? hours to empty 6/6 (the whole pool)