Hello Rohit, 

With your category rank, you have about null chances of procuring a seat in MBM and RTU Kota as these both are in the list of top most engineering colleges in Rajasthan and are government colleges too. Yes, you might have chances for some lower branches in CTAE Udaipur and RTU Bikaner basically called BTU.

But it seems like you have not filled it. 

By the way GCE Ajmer is a good college with not so much hi-fi rankings but yes overall it is good in terms of placements and all. The mechanical engineering branch is one of the three top branches there. So it is not a problem if you get it there and join it.

Hope it helped..