sure, and unless we're talking about anorexic dudes or something, three of them added together weigh significantly more than 280 pounds.
There are like 3 lions in that picture, and I see one male one in the background not doing anything? So lets count the male lion for 10 humans (total bullshit). 100 humans are roughly 5 times as strong as that pack of lions.
How do you get 100 humans are roughly 5 times as strong as 5 lions exactly? You do realize that weight does not directly translate to strength, right?
1. I gave an overestimate to the male lion in the back that isn't doing anything 2. Here we see the hippopotamus shrugging off what looks like 3 280 pound lions. That's 10 humans worth of weight. It's not going fast so the lions are clearly holding it back and will likely take it down eventually. 3. By "strength" here, I mean specifically weight, as in, 100 humans run up and sit on the fucking hippo so that it literally can't move. Nothing about clawing through the hide or anything. 100 humans is enough to crush a hippo in just weight. If every human weighed 150 pounds, it would be heavier than dropping a fucking elephant on the hippo.
Would 100 humans even be able to coordinate a swarming attack without the hippo fucking up most of the humans before they can even pile him into the ground?
A pack of what looks like four lions, at minimum, struggled to take down the hippo. Lions are ferocious hunters and skilled at taking down prey, far more so than an unequipped human.