Hi, Previously Posted

If Mary can paint one room in 100 minutes, and Jake can paint one room in 150 minutes, 

how long  will it take if they work together?

Question states*** PER min Key

    |Multiplying thru by 300x so as all denominators = 1

 3x + 2x = 300

    5x = 300

     x = 60min or 1 hr together 

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