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    Question

    The ratio of length to breadth to

    height of a cuboidal box is 6:5:4. If the total surface area of the cuboid is 1,392 cm², then find its lateral surface area.
    A 692 cm² Correct Answer Incorrect Answer
    B 792 cm² Correct Answer Incorrect Answer
    C 455 cm² Correct Answer Incorrect Answer
    D 926 cm² Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the dimensions be 5x, and 4x. Using the total surface area formula:

    Now, the lateral surface area:

    Thus, the lateral surface area is 792 cm2

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