Hi

Let x represent time it takes together

Question states*** per day is the Equalizer

 1/4 + 1/6 + 1/2 = 1/x  |Multiplying thru by 12x so as all denominators = 1

  3x + 2x + 6x = 12

        11x = 12

          x = 12/11 = 1.09 hours together 

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