Divide the subjects as per your comfort. It you can do all 3 subjects equally in a day then do that OR do one subject each day and keep rotating.. Anything which you're comfortable with.

Now divide the chapters of physics into 3 parts.. Part A - chapters that you know very well

Part B - chapters that you need to revise

Part C - difficult ones...

Give a Little bit more time for part C chapters... And also keep revising part B chapters almost equally. And for Part A chapters you can really quick by alloting around 30-50 minutes that's it. Keep solving the mcqs properly for each of the sections so that your hand is really well set before the exam.

Know which subjects you're really strong and which you find easy. Do that a little less if you're confident enough and focus on physics more then. Studying smart is really very important when giving competitive entrance examinations.

Refer to the sites below for more detailed information..

https://engineering.careers360.com/articles/viteee-exam-pattern

https://engineering.careers360.com/articles/viteee-syllabus

Best wishes. Thank you.