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Some parts of Tianjin mathematics are the same.
Let the length and width of rectangular land be x and y respectively.

And then x? +y？ = 100

xy=48

Use the sum of squares formula

(x+y)？ =x？ +y？ +2xy= 100+2*48= 196

So x+y= 14.

So the circumference is 2(x+y)=28 meters.

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