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September 16, 2014

September 16, 2014

Posted by **jen** on Tuesday, March 9, 2010 at 1:39am.

- math -
**FredR**, Tuesday, March 9, 2010 at 5:00amIt would take 10 minutes.

- math -
**Reiny**, Tuesday, March 9, 2010 at 7:33amrate office jet = 1copy/10 min

rate of laserjet = 1copy/20 min

combined rate = 1copy/10 + 1copy/20 = 3copy/20minutes

time for combined rate = 1 copy/(3copy/20min) = 20/3 minutes or

6 minutes, 40 seconds

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