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    Question

    Six cubes each of side 5 cm are attached end to end to form

    a cuboid. Find the total surface area of the cuboid.
    A 650 cm² Correct Answer Incorrect Answer
    B 400 cm² Correct Answer Incorrect Answer
    C 750 cm² Correct Answer Incorrect Answer
    D 815 cm² Correct Answer Incorrect Answer

    Solution

    ATQ,

    Length of cuboid = 6 × 5 = 30 cm

    Breadth of cuboid = 5 cm

    Height of cuboid = 5 cm

    Total surface area of cuboid = 2 × (lb + bh + hl), where 'l', 'b' and 'h' are

    length, breadth and height respectively

    So, required area = 2 × (30 × 5 + 5 × 5 + 5 × 30)

    = 2 × (150 + 25 + 150)

    = 2 × 325

    = 650 cm²

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