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December 20, 2014

December 20, 2014

Posted by **bob** on Thursday, May 26, 2011 at 2:23am.

- math -
**Reiny**, Thursday, May 26, 2011 at 6:53amrates of each of the pipes are 1/8 pools per hour, 1/12 pools per hour, and 24 pools per hour.

the combined rate would be

(1/8 + 1/12 + 1/24) pools per hour

= 1/4 units per hour

Time using combined rate = 1 pool/(1 pool/4) hours

= 4 hours

(the "pool" unit canceled)

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