College is for 6.5 hours a day with 9 classes of 40–45 minutes each. Promotion to the next grade is based on a minimum of 35% marks in each subject throughout the academic year.
The passage describes a typical college schedule that involves six and a half hours of classes daily, with each class lasting between 40 and 45 minutes.  Students must achieve at least a 35% average grade across all subjects to advance to the next grade level.