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18 February, 19:55

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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  1. 18 February, 22:43
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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
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