I need help with question 21. I am stuck on that question.

Answer:
240 ft²
Step-by-step explanation:
First we need to find 60% of 20, which is 12.
That means the width is 12 ft and the length is 20 ft.
But thats not all now we have to multiply both sides to find the area.
So 12 times 20 equals is 240 ft ².
Hope this helped :)