There are several ways to approach this problem.
I'm doing adding two rectangles' areas after cutting a shape "method"
Divide the shape with a line that forms two different rectangles: 60x13 dimensions of a larger rectangle and 25x(25-13) dimensions, which is 25x12 dimensions of a smaller rectangle.
Now, find the areas of both rectangles:
A = lw + lw
= (60 times 13) + (25 times 12)
= 780 + 300 = ?
ANSWER: 1080 feet squared (click on the top answer)