Answer: 380 ft and 780 ft
Explanation:
We can assume that the flag is a rectangle. If the width of the flag is w, then the length is w + 400.
The formula for the perimeter of a rectangle is
. Let's plug in the values we know.
![P=2(l+w)\\2320=2(w+400+w)\\1160=2w+400\\760=2w\\w=380](https://img.qammunity.org/2023/formulas/mathematics/high-school/fxzo353287imu0j6brds58vdbhad4ra65n.png)
We know that the length is 400 more than the width, so let's find the length.
![l=w+400\\l=380+400=780](https://img.qammunity.org/2023/formulas/mathematics/high-school/shzy9rnq44r5wwnuj0p1g5xe0dmz77rrb0.png)
Hence, the flag's width is 380 ft and the length is 780 ft.