For a rank of 3000-3500 in jee mains, what should be my marks in a :- a) Hard Paper b) Moderate Paper c) Easy paper

Dear student,
According to the previous years cut off you should score approx 185-190 marks to secure a rank of 3000-3500 if you belong to open category when the paper is of moderate level. Also if the paper is easy then you must score a bit high i.e. approx 190-195 and if the paper if a bit hard then if you score a bit less for example, 182-185 then you can score the mentioned rank. For more information on rank vs marks of jee mains you nay visit the following link:
https://engineering.careers360.com/articles/jee-main-marks-vs-rank