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    Question

    The areas of two similar triangles ΔPQR and ΔXYZ are

    12.96 cm2 and 635.04 cm2 , respectively. If QR = 2.9 cm, then the length (in cm) of YZ equals:
    A 30.4 Correct Answer Incorrect Answer
    B 20.3 Correct Answer Incorrect Answer
    C 23.2 Correct Answer Incorrect Answer
    D 25.2 Correct Answer Incorrect Answer

    Solution

    Thought for a few seconds Area ratio (XYZ : PQR) = 635.04 ÷ 12.96 = 49 Side ratio = √49 = 7 YZ = 2.9 × 7 = 20.3 cm

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