Answer:
234 Square Inches
Explanation:
Length of the Painting=16 in
Width of the Painting= 11 inch
Since the mat adds 1 inch to each side of the length and the width.
Therefore:
Length of the mat=16+1+1=18 Inch
Width of the Mat=11+1+1=13 Inch
Area of the Mat= Length X Width
=18X13=234 Square Inches