`   Population of 67 millions ? 67 lak is 67 * 100,000. which is 6.7 million.  I changed to have the metro population again. If you are going to consider ``greater  Hyderabad``, you had to consider greater Los Angeles ... which might include Los Angeles ...even  Seattle, depending on definitions.  Look at a map of India. The entire subcontinent could be considered one city if you require a defined barren zone  of X km between cities. Metro probably includes the 100th town after the edge of the city anyway.`