Hey Arun, You have scored 82.5% in TN Boards and your JEE Percentile is 30.9. With this percentile, there are very fewer chances of being getting admission at Sastra university but you can apply there and I would personally suggest you apply in SASTRA University and you can even apply in some private colleges so as to get a seat there and secure there. You can check your colleges and explore them properly and choose the best one for you at JEE MAINS COLLEGE PREDICTOR. It will be really helpful to you and will provide you the best solutions.

You can check about Sastra university at: -

https://www.careers360.com/university/shanmugha-arts-science-technology-research-and-academy-thanjavur#examsCutoff

You can check JEE MAINS COLLEGE PREDICTOR at: -

https://engineering.careers360.com/jee-main-college-predictor?icn=jee-main-clgpd_landing-page&ici=prediction-section_c360-home