SOLUTION: Pump A can fill a tank of water in 3 hours. Pump B can fill the same tank in 6 hours. How long does it take the two pumps working together to fill the tank?
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Question 871507: Pump A can fill a tank of water in 3 hours. Pump B can fill the same tank in 6 hours. How long does it take the two pumps working together to fill the tank? Found 2 solutions by josgarithmetic, richwmiller:Answer by josgarithmetic(39620) (Show Source):
You can put this solution on YOUR website! You use two things:
The rate of both pumps operating together is the sum of their individual rates, and the rate unit is in tank per hour.
You can put this solution on YOUR website! 1/3+1/6=1/x
2/6+1/6=1/x
3/6=1/x
1/2=1/x
x=2
each hour one pump does 1/3 and the other does 1/6
so in two hours one does 2/3 and the other does 2/6 or 1/3
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