SOLUTION: 4 pipes a,b,c,d can fill a tank in 3,6,9,12 days respectively. what is the least portion of tank that can be filled in one day by any three of pipes working together at their resp

Question 791038: 4 pipes a,b,c,d can fill a tank in 3,6,9,12 days respectively. what is the least portion of tank that can be filled in one day by any three of pipes working together at their respective rates?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
4 pipes a,b,c,d can fill a tank in 3,6,9,12 days respectively.
what is the least portion of tank that can be filled in one day by any three of pipes working together at their respective rates?
:
+ +
Common denominator is 36
+ + = th of the tank
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