Dear rati mah
Every year rank required to get into B Asch course slightle changes.
last year opening and cloasing rank in IIT Kharagpur was 3158-5948
and for IIT Roorkee was 4041-6513.
Please feel free to post as many doubts on our discussion forum as you can.
If you find any question Difficult to understand - post it here and we will get you
the answer and detailed solution very quickly.
We are all IITians and here to help you in your IIT JEE preparation.
All the best.
Regards,
Askiitians Experts
Badiuddin