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    Question

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    A 18.4 cm Correct Answer Incorrect Answer
    B 20 cm Correct Answer Incorrect Answer
    C 18 cm Correct Answer Incorrect Answer
    D 20.4 cm Correct Answer Incorrect Answer

    Solution

    Perimeter of ∆ABC and ∆DEF is 43.2 and 28.8cm Ratio of side ABC and DEF is AB/DE = P1/P2 = AB : DE = 43.2 : 28.8 = AB : DE = 3 : 2 = AB : DE = 3 × 6 : 2 × 6 = AB : DE = 18 : 12 = DE = 12 = AB = 18

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