How much studying does it take to get a degree?

Some fields require more work than others, and some people pick up concepts faster than others. If you're getting all A's, you don't need to compare yourself to anyone else. If you're not, maybe you should be working harder. It would help to figure out what you're going to do with that degree; you'd need a PhD to do much of anything in the field, and you'll need great grades and research experience to get into grad school. If you've got a lot of free time, look into starting research with a professor. There is no magic amount of hours you need to spend studying. It depends on you.