i got 31000 rank in rpet 2011,. which best college can i get?

Maximum Number of companies come to the following colleges.

1.MNIT , Jaipur
2.JECRC , Jaipur
3.SKIT , Jaipur
4.LNMIIT , Jaipur
5.MBM , Jodhpur
6.Poornima ,Jaipur
7.Ajmer Engineering College , Ajmer
8.Arya,Jaipur

SKIT

you should try in vit jaipur,yit,maharshi arvind

try top colleges of rajsthan.. forms are available here..
http://techedu.rajasthan.gov.in/RPET/pdf/APPLICATION%20FORM_aieee_2011.pdf
Try VIT & VIT East code 69 & 70.. visit www.vitj.ac.in for more details