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    Question

    Three cubes of equal volume are joined end to end. Find

    the surface area of the resulting cuboid if the diagonal of the cube is 7√3cm.
    A 574cm² Correct Answer Incorrect Answer
    B 686cm² Correct Answer Incorrect Answer
    C 540cm² Correct Answer Incorrect Answer
    D 504cm² Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    Given – diagonal = a√3cm =7√3cm a = 7cm  Visible faces =14 Surface area of visible faces: - 14a² =14 ×49 =686cm²

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