Indian Institute of Technology, IIT Bombay

It will be very difficult as the cutoff is likely to be around 92 percentile.

You are advised to appear for JEE Mains and JEE Advanced to seek admission in graduation degree in technology. You are advised to appear for GATE to seek admission on M.Tech. You are advised to appear in JAM for seeking admission in M.Sc at IIT, Powai.

IIT Bombay is a premier business school and accepts only CAT score.

BITS Pilani has civil engineering department which is more than 50 years old. Admission is based on BITSAT.

For more information about flight training please go through this article
https://www.shiksha.com/career-in-commercial-flying-all-you-need-to-know-article-13472-1

I think, you have heard about the new amendment, which is 75% is the eligible score to getting into IITs and NITs. If you belong to reserved category, then 65% is required. If you had already scored 70%, then try for other things. IITs are not the end of world. If you are yet to appear for boards, then study properly.
All the best.

You need to secure under 1400(general rank) in JEE advance. You will surely get it.