How many hours should I study in a day to crack CAT 2019?
Its like asking how many hours will it take me to learn mountaineering. The answer will always be: It depends. It certainly varies from people to people and hence mentioning a number to answer the question will not justify the purpose.
So I'll rather answer what it would take to crack 2019 an how to go about the same.
Here is a good link to cover your course preparation: CAT Preparation Strategy
Further, mock tests are crucial. Assess your strengths and weaknesses and learn the skill to manage the time at the exam. Finally the most important job is to sit and analyze your mistakes and find possible and better alternatives to the solutions.
Here is a 90 day plan to reach your goal: 90 Day CAT Plan
Verbal Ability Preparation: How to ace the verbal ability section
Quantitative Aptitude Preparation: How to ace the quantitative aptitude section
Webinar on test taking strategies (by 4 time CAT 100 percentiler): Webinar on CAT Strategy
Join a coaching institute's (Time/Career Launcher) interview program. Practice GDs. Know your work experience well and study atleast one academic topic in depth. Make yourself aware of the current affairs
Consolidated Current Affairs Sources: Current Affairs resources
Be confident for the interview. Be a story teller!! Good Luck :)
As rightly pointed out by Mehul in the above answer, it is not the quantity of hours you put into your studies that will matter but the quality of work you put into these hours. Team InsideIIM has numerous articles which can guide you in this regard. You may like to explore the CAT preparation archive by following the link given below:
Please read the articles in this archive, it covers a broad spectrum from daily preparation tips, how to analyse mock exams, how to prepare for various sections etc. It is quite exhaustive and it will be very helpful with all of your queries.
Hope it helps. All the best !!