Hello, The classes will be starting from 29th of july. The admission date for btech according to the university calendar is July 23. So you will have to be on campus by then. For more details, check out the link for the academic calendar for this semester- https://www.iitm.ac.in/sites/default/files/uploads/calendar_jul-nov_2019_version_1.pdf
Candidates can check B.Tech Cut off for Top IITs & NITs here.
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