Question 1098571
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If  "x is the length of one side of this fence" (in meters), then the length of an adjacent side (of ANY adjacent side) is {{{400/x}}} meters.


Thus the perimeter P(x) is equal to  P(x) = x + {{{400/x}}} + x + {{{400/x}}} = 2x + {{{800/x}}} meters.


<U>Answer</U>.  P(x) = 2x + {{{800/x}}} meters.
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