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January 25, 2015

January 25, 2015

Posted by **NEED HELP NOW!!** on Friday, February 22, 2013 at 6:41pm.

Just need an equation.

Thank you!

- Algebra 1 -
**drwls**, Saturday, February 23, 2013 at 8:52amLet tank volume = V in gallons

First pipe fill rate = Q1 = V/12 g.p.m

Second pipe fill rate = Q2 = V/10 g.p.m

Let Q3 = third pipe fill rate in gallons/min

4 minutes = V/(Q1 + Q2 + Q3)

= V/(V/12 + V/10 + Q3).

= 1/(1/12 + 1/10 + Q3/V)

1/3 + 2/5 + 4 Q3/V = 1

4 Q3/V = 4/15

Q3/V = 1/15

Fill time with pipe 3 alone = V/Q3 = 15 minutes

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