Question 387049
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Hi,         
Let x represent time it will take to type a 6-page paper
Question Sets Up the Proportion
  30min/.75 page = x/6 pages
Cross Multiply to solve for x
 .75x = 6*30min
    x = 6*30min/.75
    x = 240min or 4 hrs

CHECKING our Answer
   30/.75 = 40 =  240/6 = 40