Dear Aspirants ,

Mostly 12th course is based on Physics ,Chemistry ,Math with Biology and IT subjects are available .First of all you should plan or you should prepare a schedule because mostly much more time spends in college if you are free in evening hours then plan your time with subjects and start from basic and go through each chapter wise after complete your course you can go through the previous 4-5 years question papers this will helpful to knowing which types questions are comping in exam and start solving .If you having facing problems then you will get also answer papers and you can refer but try to avoid answer sheet because it will de motive .

As per your query time will depends upon you such as much dedicatedly you will complete your course but its not mean if you complete your course in 2 months then after not study regular then you will start forget slowly day by day .So consistence is required in our studies .

Hope it will helpful

Thanks