Wait, wait, wait... If you have a base that's 20x20, you would have a total of 2,868 cups. In order to get at least 3,311 cups, you would need a base that's 22x22, but that would give you 3,693 cups (a 21x21 would give you 3209, not enough). I think we have some faulty information on our hands.
Largest Solo Cup Pyramid
Wait, wait, wait... If you have a base that's 20x20, you would have a total of 2,868 cups. In order to get at least 3,311 cups, you would need a base that's 22x22, but that would give you 3,693 cups (a 21x21 would give you 3209, not enough). I think we have some faulty information on our hands.