Answer:
576 sq. feet.
Explanation:
There are two walls of 9 feet by 12 feet dimensions.
Therefore, the total area of those two walls is 2(9 × 12) = 216 sq. ft.
Again, there are two walls of dimensions 9 ft by 20 ft.
So, the total area of those two walls is 2(9 × 20) = 360 sq. feet.
Hence, the total area of the wall that Layla painted is (216 + 360) = 576 sq. feet. (Answer)