I wouldn’t say that securing an above 9.0 CGPA at IIT Kharagpur is very tough. With the right motivation, even an average student can get a 9+ CGPA. When it comes to grading, IIT KGP has two methods
So we can conclude that getting a 9+ CGPA becomes a lot easier if you have no other distractions such as research or social work and you have been attending classes regularly.
Lastly, I would like to say that CGPA is not the only deciding factor. There are many students with a decent CGPA of 8+ who have made decent accomplishments and done high-level research or wonders in startups. The main agenda is to gain maximum exposure and then plan your future.