Hi,

The time required for study in a day depend on the ability of Student to grasp the particular topic and his intelligence.

Some students are fast learner while some are slow learner. Slow learner requirers more time to understand a topic. So it depend individual that how much time they require.

Usually If one attend lectures regularly and revise all what is taught and study daily upto 2-3 hours daily study is sufficient. If one make his/her own notes or have some writing works thannit may require extra time.

However it is just an average time suggestions. You should devote time to study in such manner that you should cover entire syllabus in whole year with proper understanding. So analyze yourself how much time you will need and study accordingly.

Hope it helps.