Hi there,
It depends on your category which rank you get. The KEAM cutoff will vary based on the institute, course and the candidates category. The expected cutoff of KEAM for General category is 50% whereas for other categories like SC/ST/SEBC is 40%.
You can check this article for the cut off of keam and have a knowledge of various government colleges cut off marks.
https://engineering.careers360.com/articles/keam-cutoff