Unable to extract the rar from fedora-20 as the packages are not available. So tried with yum install but it is not working ?

[root@gururaj ~]# yum install unrar
Loaded plugins: langpacks, presto, refresh-packagekit
Setting up Install Process
No package unrar available.
Error: Nothing to do

As fedora-20 repositories are not free software, so the  unrar program is not included. 

It is  available in the RPMFusion repository. Follow the instructions here to enable RPMFusion. Once you've done that, you can simply  

yum install unrar