Did South Korea and Republic of India exist in the same era?

Yes, the two civilizations both existed around 1948 CE.

Which lasted longer, South Korea or Republic of India?

Republic of India lasted longer (79 years).

South Korea: Asya; Republic of India: Güney Asya

South Korea (1948 CE – present) and Republic of India (1947 CE – present) lived in the same era.

	South Korea	Republic of India
Period	1948 CE – present	1947 CE – present
Duration	78 years	79 years
Region	Asya	Güney Asya
Capital	—	Yeni Delhi
Type	Country	Republic
Government	Cumhuriyet	Federal Parlamenter Cumhuriyet
Religion	—	Hinduizm, İslam, diğerleri
Language	—	Hintçe, İngilizce
Peak population	51,709,098	1,400,000,000
Rulers	18	8

Republic of Korea · Asia

The world's largest democracy. It gained independence through Gandhi's nonviolent resistance movement. Unity in diversity.

Did South Korea and Republic of India exist in the same era?: Yes, the two civilizations both existed around 1948 CE.
Which lasted longer, South Korea or Republic of India?: Republic of India lasted longer (79 years).
Which regions did South Korea and Republic of India rule?: South Korea: Asya; Republic of India: Güney Asya