Any rank between 20k to 30k is considered to be a good rank in a state-level engineering entrance examination like KCET. you can get top engineering college with some reservation categories but don't worry if you don't have because you can get some other good  engineering colleges with your rank.

you can get CSE branch in some good colleges in Bangalore.

Considering  the score you mentioned, It is difficult to predict your college based only on rank because there will be reservation in KCET seat allotment. But I can suggest you some top engineering colleges.

Some top engineering college list :

• R.V. College of Engineering
• BMS Institute of Technology
• M.S. Ramaiah Institute of Technology
• Bengaluru Institute of Technology
• Dayanand Sagara Institute of Technology
• Nitte Meenakshi Institute of Technology

you can use college predictor link from the given link :-

Hope this helps..!