😭🙏(why did)

https://preview.redd.it/ickstz2m4eme1.png?width=1073&format=png&auto=webp&s=d2eff340b1fbf353f53aba029878396c87510898

https://preview.redd.it/vh6c1z2m4eme1.png?width=297&format=png&auto=webp&s=8a583132985d9eb990549f6149e5f1b3a9aa0870

why did we not take 2pirls>= (2)*4pir^2s and same for volume cause two sphere also by this soln wouln't L>= 9r/2 come out so how could there be a maximum between the two sphere