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

Algebra ->  Rate-of-work-word-problems -> 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      Log On


   



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) About Me  (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?
:
1%2F12 + 1%2F9 + 1%2F6
Common denominator is 36
3%2F36 + 4%2F36 + 6%2F36 = 13%2F36th of the tank