Question 610118
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Hi
if 20 men can make 10 rooms of equal sizes in 18 days: @ doing 1/2 rm
   27men *1/2  can do  27/2 rms in 18 days
Sets Up the Proportion:
    {{{(27/2)/18 = 15/t}}}
      (27/2)t = 15*18
            t = 15*18(2/27)
            t = 60/3 = 20days