The length of the speech should not matter, but the information you pack into that speech should be the thing that really matters, I could write a ten page essay of a bunch of nonsense, but I can also write a two page essay that has a lot of good information and packs a punch.
If I were actually a teacher I would not read a ten page essay because that’s just too much to read because you’re not just reading one ten page essay, you are reading multiple classes essays , also I think that you could get a better grade by writing a two page essay because the teachers are actually going to take time to read it and realize how good of information you have or a good argument.
You would be able to tell if it’s going to be a good essay just by the introduction sentence or the thesis.
If you gave me a ten page essay I am going to tell you straight up that I am not gonna do it , or I would attempt it but I doubt it would happen, I don’t even think I could write a ten page essay unless I had a really good topic that I can just keep on writing about.