Answered

What if there was a square window on the wall with a side length of 2 feet? how much wallpaper would lila need then?

Verified Answer :

if the length of the wall is L and the width is W  feet the the area of wallpaper required is the total area of the wall - area of the window:-
= (WL - 2^2)
= (WL - 4) ft^2

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