Dear Student,
Every topper has just one strategy, and that is, to not count the hours of study but to work with your best efforts in less time. And to be very good at time management. Coming to the number of hours, if you genuinely want to know, then it is 9 to 10 hours daily. It might depend person to person. One more suggestion which I would like to give you is that, do not compare yourself with anyone else. Not two people are same. May be you study for less hours but with optimum concentration, then those hours are worth it. Otherwise even if you study for 12 hours a day and you are doing it with all the distractions and with no concentration, you will end up wasting your day. Also, don't exert your body and mind to study for more hours.
Happy Learning!
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