Hello aspirant, 

According to your percentile in jee mains your general rank will be predicted approx 78k and obc rank will be in between 25k-30k.And to get admission in VNIT nagpur your rank should must under 10000 as predicted previous year cutoff.so there very less chance to get seat in that college so I personally advice you to go for next attempt of jee mains and bring a good percentile .

Good luck