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    Given that ∆ABC ~ ∆DEF, if BC = 12.5 cm and EF = 10 cm, then the areas of ∆ABC and ∆DEF are in the ratio of:
    Question

    Given that ∆ABC ~ ∆DEF, if BC = 12.5 cm and EF = 10 cm, then the areas of ∆ABC and ∆DEF are in the ratio of:

    A.

    3 : 4

    B.

    16 : 25

    C.

    25 : 16

    D.

    1 : 2

    Correct option is C

    Given:

    ΔABC∼ΔDEF

    BC = 12.5 cm

    EF = 10 cm

    Formula Used:

    Ratio of areas = (Corresponding sidesCorresponding sides)2\left(\frac{\text{Corresponding sides}}{\text{Corresponding sides}}\right)^2

    Solution:

    The ratio of the corresponding sides BC and EF is

    (BCEF)2\left(\frac{BC}{EF}\right)^2​​

    = (12.510)2\left(\frac{12.5}{10}\right)^2​​

    = (125100)2\left(\frac{125}{100}\right)^2​​

    = (54)2\left(\frac{5}{4}\right)^2

    = 2516\frac{25}{16}

    25 : 16

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