Rank is something that depends on total number of candidates appeared, highest marks scored in the exam, marks scored in each subject and category. It is difficult to predict the exact marks but a safe score is 140 marks or above in EAMCET. You must have minimum 550 marks out of in600 marks in PCM subjects in first and second year as 75% EAMCET+25% IPE weightage is added to determine your rank. This is just an approximate marks.
We have TS EAMCET knockout package, please try it as it will help you with your preparation