Only  a few seats are offered through Jee Mains in Chaitanya Bharathi Institute Of Technology, Hyderabad. So the cutoffs will be quite high. For a general category candidate, you must have a rank within 15,000 to 20,000 if you want to get into CSE. For other branches the cutoffs can go up to 50,000 rank. 240 marks in Jee Main is very good and it seems that you have that required rank.