Length is 10 feet. Width is 4 feet.
Work Step by Step
Let $w$ be the width. Let $l$ be the length. $l=3w-2$ $2l+2w=28$ $2(3w-2)+2w=28$ $6w-4+2w=28$ $8w-4=28$ $8w=32$ $w=4$ $l=3w-2$ $l=3(4)-2$ $l=10$
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