you have to now focus on board exams as it is also important to get a minimum 75% marks.....i hope you have covered your class 11th syllabus till now.....just revise it after your board exams are over.....no. of hours you study is not of much importance.....how much you study in those hours matters a lot!!

Focus on 12th board exam , then solve JEE question bank. Cos No us there to study class 11. And if u have done or revised your class 11th earlier you will surely get marks in mains .