For EAMCET, ranking would be based on several variables such as students' overall performance, normalization, and category. But looking at general trends from past years, a score of around 42 marks should give you a ranking of about 30,000 to 50,000, depending upon how difficult the paper was and the number of candidates.

For a more accurate rank estimate, you can check the official EAMCET rank predictor tool once the results are out.
Candidates with a rank of 1-50 in TS EAMCET