a)
The length of the metal sheet, l=20 in.
From the corners of the sheet, squares of side length x is cut out. So, the length reduces by 2x.
Hence, the expression for the length of the metal tray is,
20-2x.
b)
The original width of the sheet, w=14 in.
A square piece of length x is cut from corners. So, the width reduces by 2x.
So, the expression for the width of the tray is,
14-2x.
