SOLUTION: One pump can fill a pool in 10 hr. Working with a second slower pump, the two pumps together can fill the pool in 6 hr. How fast can the second pump fill the pool by itself?

Question 900179: One pump can fill a pool in 10 hr. Working with a second slower pump, the two pumps together can fill the pool in 6 hr. How fast can the second pump fill the pool by itself?
Found 2 solutions by nathany1280, josgarithmetic:
Answer by nathany1280(5) (Show Source): You can put this solution on YOUR website!
the first pump obviously pumps faster and pumps in 10hr. with the 2nd pump, it pumps in 6hr. You would do 10-6 because you know how long the first one pumps and you subtract it to find how much faster does the 2nd one pump. then you add 4 to the 10 which is 14hr.

Answer: 14hr for the 2nd pump to fill the pool
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
You can think of this tank or pool filling as a doing a job or a work problem with uniform rates.

RT=J and 1 job is "fill the pool".

Rates:
Regular pump,
Slower pump,
Combined pumps,

You only have the addition of rates, because they are like "moving in the same direction" when they work together.

LCD is 30x.
Multiply both sides by 30x.

------The time in HOURS for the slower pump to fill the pool if working alone.
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