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A city planner has placed a square wading pool in the center of a park. The pool is surrpunded by a square fence, 20 meters wide. The tiles for the floor of the wading pool cover 121 sqaure meters. How wide is the wooden deck sprrounding the wading pool?

  • math -

    sqrt(121) = 11
    so pool is 11 by 11
    11 + 2w = 20
    2w = 9
    w = 4.5

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