Hi , 

For detailed information regarding cutoffs refer this link. 

https://www.careers360.com/colleges/ramrao-adik-institute-of-technology-navi-mumbai/cut-off

The closing ranks in the general category ranges from 30k to 1 lakh in various courses.  And so since you are obc with a rank of 70000 you have a small chance of getting admission at RAIT , but can't be sure that you can get your desired branch . You might get Information Technology.  

Hope this was helpful. 

For further queries please approach careers360.