Download the RAR package from
http://www.rarlab.com/rar/rarlinux-3.6.0.tar.gz
Now log in as root in terminal
Go to the folder where you have saved the file 'rarlinux-3.6.0.tar.gz' using terminal
Extract the file using the following command
tar -zxvf rarlinux-3.6.0.tar.gz
Go into the extracted folder
cd rar
Type the following in terminal
./unrar
Then copy the rar and unrar file to /bin
cp rar unrar /bin
Now when you right click over the rar files which you want to extract, you will be get extracted file without any issue
