A doll house uses a scale factor of 1 over 12 . The perimeter of a square room in the doll house is 36 inches . What is the length of the full size room ?
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k= 1/12 perimeter of doll house= 36 inches :. length of doll house= 36inches / 4 = 9 inches length of actual= length of doll house x k(inverse) :. actual lenght= 9 inches x 12/1 = 108 inches
