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August 20, 2014

August 20, 2014

Posted by **pam** on Tuesday, April 2, 2013 at 9:51pm.

- MATH -
**Reiny**, Tuesday, April 2, 2013 at 10:12pmJack's rate alone = 1/3

Marilyn's rate = 1/5

combined rate = 1/3 + 1/5 = 8/15

time at combined rate = 1/(8/15) = 15/8 = 1.875 hrs

or 1 hour and appr 53 minutes

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