SOLUTION: If one cashier can count a certain sum of money in 2 hours, and another cashier can count the same sum in 3 hours, then both cashiers working together can count this sum in ??? hou

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: If one cashier can count a certain sum of money in 2 hours, and another cashier can count the same sum in 3 hours, then both cashiers working together can count this sum in ??? hou      Log On


   

Question 624097: If one cashier can count a certain sum of money in 2 hours, and another cashier can count the same sum in 3 hours, then both cashiers working together can count this sum in ??? hour and ???? minutes.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If A can do a job in x time periods, then A can do of the job in 1 time period. Likewise, if B can do the same job in y time periods, then B can do of the job in 1 time period.

So, working together, they can do



of the job in 1 time period.

Therefore, they can do the whole job in:



time periods. I'm presuming that you can convert from a decimal fraction of hours to minutes.


John

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