INDIAN HISTORY

Detailed explanation-1: -Magadh was the most powerful city state of India in the 6th century, it was nucleus for many big kingdoms like Mauryas and Guptas between 6th and 8th century. Was this answer helpful?

Detailed explanation-2: -The most powerful city state of India in the 6th century BC was Magadh. The Magadha Empire came into existence when the four Mahajanpada-Magadha, Kosala, Vatsa and Avanti were engaged in the struggle for the supremacy from the 6th Century BC to 4th Century BC.

Detailed explanation-3: -Magadha emerged as the strongest and most powerful mahajanapada. It was a monarchical mahajanapada. The first important and powerful ruler of Magadha was Bimbisara, who ruled in the second half of 6th century BCE.

Detailed explanation-4: -Mumbai is the largest as well as the richest city in India.

Detailed explanation-5: -Detailed Solution. The most powerful city among all the Mahajanpadas is Magadha.