Posted by **Shane** on Monday, November 18, 2013 at 7:54pm.

One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take two pumps, working together, to empty the pool?

- math -
**dina**, Monday, November 18, 2013 at 7:56pm
12/25,1/50,11/20

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