My version of thisscience subjects - for each hour in class, I spend another 2 hours outside class doing work (but that may be research/reading/assignmenting rather than 'study')
arts subjects - for each hour in class, another 3 or so doing work (mostly reading because I do english classes which require a novel per week + readings + other prep).
So if you do 20 hours a week in classes, that's 100 hours a week all upFor each hour of lecture/tutes, 4 hours of independent study.
So basically 40 hours - like a full time job..i went to unsw smart start, they said we should do 10hrs/week for each subject including hrs in timetable