Greetings of the day dear Mahendra
EAMCET Rank depends on the combined score that you get from EAMCET score and Board mark (75% EAMCET + 25% IPE).
Keeping this in mind you will get some score for 100.
In this way rank will be calculated.
Generally for an EAMCET score of 70 and IPE score around 730 marks, you will be getting some rank around 20,000 - 25,000.
Hope I've cleared all your doubts!!
All the best for your future endeavours
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