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    IBEasyGeometry & Trigonometry7–9

    Height of a Tower from a Scale Model

    Altura de uma Torre a Partir de uma Maqueta

    A museum displays a model of a tower built to the scale 1:2001 : 200. The model measures 17.517.5 cm from its base to the top. How tall is the real tower, in metres?

    The scale says how many model lengths fit into the real length, so decide whether the real height is larger or smaller than the model before choosing the operation. The change of unit is a separate step.

    Solution

    Step 1 of 5

    1. 1.The real tower is 200200 times the model, so the model length is multiplied: