Hello ,student 

Well for jadhvpur ,you know it is at the top and have a record of  100% placement in btech  ,and since you are not from wb , then you have atleast to score around more than 110,  and as your  12'th board marks should be above 60% in PCM !! 

Sone tips :-

For maths solve previous year paper of IIT-jee , few  of the questions are directly from from previous year!! In maths .

Hope this will help you

All the best