/km 2  (24,071 /sq mi) • 13,850,507 Ethnic groups     Religious: Hinduism Muslim Sikh Jain Christian Parsi Buddhist Jew Linguistic: Urdu   Punjabi Haryanvi Bihari Bengali Tamil Rajasthani Telugu Garhwali Kannada Malayali North-East Marathi Gujarati Time zone IST  ( UTC+5:30 ) Area •  Elevation 42.7 km 2  (16 sq mi)