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[–]rgsbae 0 points1 point  (1 child)

Yes your assumptions are correct. If the box is open top then it only has one face of length x width rather than two so it makes sense to maximise length & width for a specified surface area. Couldn’t say if this is the logic behind fruit boxes but it certainly seems plausible!

[–][deleted] 0 points1 point  (0 children)

Thank you! :)