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September 21, 2014

September 21, 2014

Posted by **Saige** on Thursday, January 19, 2012 at 11:31pm.

- algebra -
**Steve**, Friday, January 20, 2012 at 10:41amrewording to indicate the rate of completion,

a = 1/6 pool/hr

b = 1/4 pool/hr

they work together for 2/3 hour, so they filled

(1/6 + 1/4)*2/3 = 5/18 pool

So, how long does it take A to fill the other 13/18 pool?

13/18 / 1/6 = 13/3 hour

So, the whole pool took 2/3 + 13/3 = 15/3 = 5 hours to fill, finishing an hour late.

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