Is 10 hour study enough

I am targeting hindu college, currently i am studying 9-10 hours everyday but i have seen a few videos where people say to study 12- 14 hours to get good college, but 10 hours is the max i can do as i have to do my freelancing work, ai and trading courses, is 9-10 hours enough to get 770? My sub are his, pol sci, eco, eng