16 hours in 3 days is ridiculous!
If it's spread out evenly, that makes the minimum amount of time in a day 5 hours 20 minutes. If this is outside of the college day then there's something wrong, seeing as you have to eat and sleep and stuff. My A level tutors said to do
at least 4 hours a week per subject. As I do 5 (technically 6) A levels, that is
at least 24 hours a week, and I cannot do that much!
And you've managed to do 16 hours in 3 days! What do colleges think that we're capable of?
I love how everyone can cope with 16 hours in a few days and I have to do over a day's worth in a week, and as I need extra time and commitment to homework and coursework, I normally require twice as much. So if we count
the hours of college that I do and the amount of time at home that
I'm supposed to do, then we get
78 hours 30 minutes of overall college work a week. (I don't have full college days but this is still ridiculous if I want to volunteer, care for my wellbeing AND have freetime too). I'm also recently volunteering, as you've figured. Try figure my life out right now. Sorry, rant over.
Personally, yes, I think 16 hours is a bit too much. Depending on if you're doing AS or A2 and also how many courses you do.