Answer: B. ![337.5\text{ ft.}^2](https://tex.z-dn.net/?f=337.5%5Ctext%7B%20ft.%7D%5E2)
Step-by-step explanation:
The area of trapezoid is given by :-
, where a and b are the parallel sides and h is the height.
From the given picture, we have
Height (h) = 15 ft
a = 20 ft.
b = 25 ft.
Then , the area of trapezoid is given by :-
![\text{Area}=\dfrac{1}{2}(15)(20+25)\\\\\Rightarrow\text{Area}=337.5\text{ ft.}^2](https://tex.z-dn.net/?f=%5Ctext%7BArea%7D%3D%5Cdfrac%7B1%7D%7B2%7D%2815%29%2820%2B25%29%5C%5C%5C%5C%5CRightarrow%5Ctext%7BArea%7D%3D337.5%5Ctext%7B%20ft.%7D%5E2)
Hence, the area of trapezoid is ![337.5\text{ ft.}^2](https://tex.z-dn.net/?f=337.5%5Ctext%7B%20ft.%7D%5E2)