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September 20, 2014

September 20, 2014

Posted by **nono** on Sunday, September 20, 2009 at 2:15pm.

- math -
**MathMate**, Sunday, September 20, 2009 at 2:25pmFor every minute, the officejet does 1/18 of the work, while the laserjet does 1/20 of the work.

Together the two printers do (1/18+1/20)=19/180 of the work every minute.

If the two work together, and assuming the work can be shared to keep the two busy all the time, the work can be done in 1/(19/180) = 180/19 = 9.47 minutes.

- math -
**Reiny**, Sunday, September 20, 2009 at 2:29pmtime = 1/(1/18 + 1/20)

= 1/(19/180) = 180/19 = 9.47 minutes

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