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    Question

    The area of four walls of a room is 128 cm2.

    If the length and breadth of the room were equal and the height of the room is 8 cm, then what is the area of the floor?
    A 64 sq.cm Correct Answer Incorrect Answer
    B 49 sq.cm Correct Answer Incorrect Answer
    C 16 sq.cm Correct Answer Incorrect Answer
    D 25 sq.cm Correct Answer Incorrect Answer

    Solution

    According to question, => l = b Area of the wall = 2(l + b)h => 128 = 2(l + l) × 8 => 128 = 4 × l × 8 => l = 128/32 = 4 cm Area of the floor = l × b = 4 × 4 = 16 cm2

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