Hello, thank you for taking the time to post your question!
The key on this type of question is finding a way to relate the variables to one another. Here we have
P = 2L + 2W = 72
L = 2W
If you plug the second equation into the first that becomes
2(2W) + 2W = 72
4W + 2W = 72
6W = 72
W = 12
Which means that L = 2(12) = 24
So the width of the rectangle is 12 meters and the length is 24 meters.
The final step then since it’s asking to find the Area is to multiply them together
A = length x width = 24 * 12 = 288 square meters
I hope that helps you get moving in a better direction on this type of question! Feel free to reach out if you have any additional questions beyond that :)