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