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  1. A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq. feet, how many feet of fencing will be required?
    2. A.

    34
    B.

    40
    C.

    68
    D.

    88

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    Answer : Option D

    Explanation :

    We have: l = 20 ft and lb = 680 sq. ft.

     

    So, b = 34 ft.

     

     Length of fencing = (l + 2b) = (20 + 68) ft = 88 ft.

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