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    Question

    The walls and ceiling of an auditorium are covered with

    fibrous material, such as glass fibre, to
    A Beautify the auditorium Correct Answer Incorrect Answer
    B Reduce the cost of construction Correct Answer Incorrect Answer
    C Make the auditorium fire-proof Correct Answer Incorrect Answer
    D Absorb sound and prevent echoes Correct Answer Incorrect Answer

    Solution

    The walls and ceiling of an auditorium are covered with fibrous materials to absorb sound and prevent echoes.

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