When we try to copy and paste the excel content into the radEditor it treats as a html table but I wish to take the contents of the copied cells from excel and paste it there without any html formatting.
Try setting the StripFormattingOnPaste property of the editor to All to Remove all HTML formatting.
StripFormattingOnPaste is used for gets or sets the value indicating how the editor should clear the HTML formatting when the user pastes data into the content area.