How much rank can I expect on 175 marks in jee mains 2020 September according to the rise in competition?

Hello Techysparta

With this marks you can get a rank anywhere between 25k to 30k considering previous year results and rank list.
The ranks may get change this year due to changes in the number of candidates therefore don't consider it to be 100 percent True.

You Can check your rank from rank predictor feature of the career 360 website it will surely give you some idea.