Hello Aviral, 

CIPET is quite a well known University for the course you mentioned. It is not too costly, the entrance exam can be cracked by average or mediocre students (it is not too difficult)  and they also have good campus placement. Even if all the students don't get placed, 60-70% of them do. They charge a yearly fee of rupees 77,800 (which is quite reasonable when it comes to engineering  colleges)  

You can find a overview of the courses they provide here: https://dqxeclau.top/colleges/central-institute-of-plastics-engineering-and-technology-lucknow/courses

Hope this helps :)