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    Question

    Three cubes, each having a side length of 9 cm, are

    connected in a straight line. Calculate the total surface area of the formed cuboid.
    A 520 cm² Correct Answer Incorrect Answer
    B 200 cm² Correct Answer Incorrect Answer
    C 650 cm² Correct Answer Incorrect Answer
    D 792 cm² Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Length of cuboid = 3 × 9 = 27 cm

    Breadth of cuboid = 9 cm

    Height of cuboid = 9 cm

    Total surface area of cuboid = 2 × (lb + bh + hl)

    So, required area = 2 × (27 × 9 + 9 × 9 + 9 × 27) = 2 × (243 + 81 + 243) = 1,134 cm²

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