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Lisa and experience shipping clerk can file a certain order in 2 hours. Jim a new clerk needs 3 hours to do the same job.  Working together how long will it take them to fill the order?

 Feb 20, 2020
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These types  are problems are easy to solve  !!!

 

Lisa  does  (1/2)  the job in one hour  and  Jim does 1/3  of the job in one hour

 

So...together....they  complete

 

1/2  + 1/3  = 

 

[ 2 + 3 ]  / 6  =

 

5/6  of the  job in one hour

 

Take the reciprocal of this   =   6/5  hrs  to complete the job working together  !!!

 

 

 

cool cool cool

 Feb 20, 2020

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