SOLUTION: Please help me with this An inlet pipe can fill a pool in 10 hours, while the drain can empty it in 12 hours if the pool is empty and both the intel pipe and the drain are open,

Question 22878: Please help me with this
An inlet pipe can fill a pool in 10 hours, while the drain can empty it in 12 hours if the pool is empty and both the intel pipe and the drain are open, how long will it take to fill the pool?
Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
SEE THE FOLLOWING EXAMPLE AND TRY.IF YOU HAVE DIFFICULTY ,I SHALL WORK OUT FOR YOU.KEY IS TO FIND HOW MUCH WILL BE FILLED OR DRAINED IN 1 HOUR BY EACH PIPE AND THEN ESTIMATR FOR THE COMBINATION IN 1 HOUR AND THEN TAKE RECIPROCAL TO FIND THE HOURS NEEDED TO FILL OR EMPTY THE FULL TANK OR WHATEVER IS NEEDED
Mixture_Word_Problems/18599: Need help with this, The inlet pipe of an oil tank can fill the tank in 1 hour, 30 minutes. The outlet pipe can empty the tank in 1 hour. How long does it take to empty the tank if both pipes are open?1 solutions Answer 9051 by venugopalramana(345) on 2005-11-08 02:05:51 (Show Source): The inlet pipe of an oil tank can fill the tank in 1 hour, 30 minutes. The outlet pipe can empty the tank in 1 hour. How long does it take to empty the tank if both pipes are open?inlet pipe fills 1 tank in 1hr 30 mts =1.5=3/2 hrs.or inlet pipe fills ...1/(3/2)=2/3 tank in 1 hr.out let pipe empties 1 tank in 1 hr....so assuming the tank is full at the start water to be emptied =1 tank and in 1 hr inlet fills 2/3 tank and out let empties 1 tank ..so net out flow is 1-2/3=(3-2)/3=1/3 tank in 1 hour.so 1/3 tank emptying needs .....1 hrthen 1 tank emptying needs ......? hrs...= 1*1/(1/3)=3 hrs.
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