Multiple Choice Questions on The total cost of flooring a room at Rs 8 50 per square metre is Rs 510 If the length of the room is........... for Mathematics - All Exams Preparation

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    The total cost of flooring a room at Rs 8.50 per square metre is Rs 510. If the length of the room is 8 m, its breadth is:

    5.5 m

    Incorrect Answer

    7.5 m

    Correct Answer

    4.5 m

    Incorrect Answer

    3.6 m

    Incorrect Answer
    Explanation:

    Area = (Total cost/Rate) = 510/8.50) m2
    = (510 ×(2/17)) m2 = 60 m2
    Area = 60 m2
    length = 8 m 
    Breadth = Area/Length = 60/8 = 7.5 m


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