What is the formula for the perimeter P of a rectangle with length L and width w? (Hint: Copy this from your book, if you don't have this memorized. Then memorize it.)
Since the length is defined in terms of the width, pick a variable for the width.
What expression will then stand for the length?
Plug the variable, the expression, and the given value into the above-mentioned formula. Solve for the variable. Back-solve for the requested values.
If you get stuck, kindly please reply showing how far you have gotten. Thank you!
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