Posted by **luckybee** on Friday, June 29, 2012 at 9:09pm.

a tank used to operate equipment can be filled with air in 3 hours. when the outlet valve is open, the same tank can be emptied in 5 hours. if the tank is filled with the outlet valve open approximately how long will it take to fill the tank? 71/2 hours. Is this correct

- algebra -
**MathMate**, Friday, June 29, 2012 at 10:15pm
Correct!

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