Answer: 60
Explanation:
So to solve this, you need to know how to find the area of a trapezoid.
In case you don't know this equation, I'll explain it briefly.
The area of a trapezoid = (a+b)*h/2, where a and b are the base lengths and h is the height of the trapezoid.
We can solve this problem using this equation, which would look like:
Area = (9+11)*6/2
= 20*6/2
= 60