http://i301.photobucket.com/albums/n...5965/MASBc.png

This is part c) of a problem using circles within squares - the first 2 parts included information necessary for part c), which included the length of the rope if the total area "eatable" was $\displaystyle 288m^2$. However, I don't know how to approach this part of the question. Please help! Thanks :)