Not Maharashtra it should be only Mumbai as the make up of Mumbai is of various cultures what we would call cosmopolitan city and therefore belongs to all the various races that made it. Its boundaries should extend to Pune at one end and the Gujerat border at the other like Umergaon and going East I will have to check the map but in general a radius of 150 Kms from Hutatma Chowk (Fountain). We would be akin to Goa or Singapore