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January 30, 2015

January 30, 2015

Posted by **Jaison** on Wednesday, March 23, 2011 at 8:54am.

Is the answer 2 11/12 days (3 days)

- Math -
**drwls**, Wednesday, March 23, 2011 at 9:20amAdd the pumping rates in pools per day to get the combined pumping rate.

Rate = 1/5 + 1/7 = 12/35 pools per day

Time required = (1 pool)/(12/35 pool/day) = 35/12 day = 70 hours

That agrees with your answer. Don't round off 35/12 as 3 days. You will be marked wrong.

- Math -
**Jaison**, Wednesday, March 23, 2011 at 9:23amThanks

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