Math CentralQuandaries & Queries


Question from Janet, a student:

Clint is constructing two adjacent rectangular dog pens. Each pen will be three times as long as it is wide, and the pens will share a common long side. If Clint has 65 ft of fencing, what are the dimensions of each pen?

Hi Janet,

Draw a diagram and label the width of one of the pens as W feet.


What is the length of the pens? Label all the sides. What is the total lengths of the sides? This total is 65 feet. Solve for W.


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