SOLUTION: a pool can be filled by one pipe in 5 hours and by a second pipe in 6 hours. How long will it take using both pipes to fill the pool?

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Question 714932: a pool can be filled by one pipe in 5 hours and by a second pipe in 6 hours. How long will it take using both pipes to fill the pool?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
1/5+1/6=1/x
(6+5)/5*6=1/x
11/30=1/x cross multiply.
11x=30
x=30/11
x=2.73 hours ans.