I am under the impression that Sarthak might not want to have one table content shared but maybe the layout of a table to be shared.
Dear Sarthak you could use probably uses Nikolas approach to create an empty table in a shared content block with css classes defined to the table, tr, td and so on.
Set the css to fit your needs.
A user would then take this shared content block to a page and unshare it getting the basic structure of the table.
Of course if you wanted to add colums to all later it would not be possible since the original tables are not connected anymore.
I guess you could also use a lot of the RadEditor nativa stuff like
Custom Dropdown could insert HTML Table
Just some ideas. Which might not work for you, sorry :-/