Hello Supriya Karmakar. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I had already answered in a previous question that your chances of going into IIT Madras are very bleak. 

Sorry to say that even your chance of getting into IIT Kharagpur is also very small. The OBC category cutoff rank is 357 as is described in this Careers360 article of ours:

• https://engineering.careers360.com/articles/gate-cutoff-for-iit-kharagpur

Hope this helps you and all the best!