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Penning for Pony

To make a pen for his new pony, Ted will use an existing fence as one side of the pen. If he has ninety-six meters of fencing, what are the dimensions of the largest rectangular pen he can make?

(Source: Mathematics Teaching in the Middle School, Nov-Dec1994)



Ted actually has another 3/4 of a foot for fencing.  How does this change the dimensions of the pen?

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