Hello,
JEE Main 2019 cut off for ECE in NIT Rourkela was:
Home state general: 12594
Home state EWS: 1699
All India General: 5674
All India EWS: 618
So, judging from previous year cut off, you need to score more than 135-140 marks in JEE Main.
Hope it helps!
Good luck!
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