Where is Chennai, India?
In the Province of Tamil Nadu, in the South-East of India. See map. The city only recently had its name changed from Madras.
Chennai (formerly known as Madras) is the gateway to Southern India and the largest city in southern India located on the Coromandel Coast of the Bay of Bengal, developed after 1639 when the British East India Company established a fort and trading post at the small fishing village of Chennai. It is the capital city of Tamilnadu state. This coastal center of trade has drawn traffic from all over the world for centuries.
The distance from Chennai to Bangalore is about 200 miles [331 highway kilometers, per mapsofindia].