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October 21, 2014

October 21, 2014

Posted by **amanda** on Friday, October 5, 2012 at 7:53pm.

- math-algebra -
**Reiny**, Friday, October 5, 2012 at 7:58pmrate of 1st pump = pool/5

rate of 2nd pump = pool/7

combined rate =pool/5 + pool/7 = 12 pool/35

time at combined time = pool/(12pool/35)

= 35/12 = 2.91666.. days

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