Respuesta :
Answer:
Area of Frame = 60 in^2
Step-by-step explanation:
The total area ("outside") is 20 in times 12 in, or 240 in^2.
The area of the opening is 10 in by 18 in, or 180 in^2.
Subtracting the latter from the former, we get
Area of Frame = 60 in^2