Which animal would win in a fight? A rhino, an elephant or a hippopotamus?

I would judge this answer by the m of the animals because size does matter. The more weight each animal can swing around, the more damage. It's like a monster truck battle with a monster truck (being the elephant), a full-sized truck (the rhino), and a honda mini coupe (being the hippo). Obviously the monster truck would win. Then the full-sized truck. Hence the elephant beating the rhino, which would easily beat the hippo.