Hi Bimal,
I'm not aware of any shortcut that will do this directly, but I use the Ctrl & C to copy, followed by Alt, E, S, T enter.
Alt followed by E brings up the Edit menu, S selects the paste special option, T selects the fomats option, and Enter will paste the formats only.
You can probably code this and add it to a custom addin, but I don't think it's worth the hassle.
Cheers
Pete