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 :This document will probably answer your first question. It provides the area and population/density of all cities and towns in India based on the 2001 statistics. It worked for cities like Trichy, Madurai, Salem and Tiruppur. For Trichy, they have included Manachanallur and Pichandarkovil in the UA for this census. For Vizag, it looks like they haven't calculated the UA figures. Only the population of Greater Vizag Municipal Corporation (GVMC) is given as 1.7 million.   "