The Ganga plain is located in a transitional belt between the Himalayas in the north and the Deccan plateau in the south covering an area of more than 7,77,000km2 from Rajasthan to West Bengal till Farakka.
Then Ganga basin extended through the longitude and latitude of 730 2′ to 8905′ E and 2106′ to 31021′ N.
Final Answer:
The Ganga plain starts from the Gangotri Glacier and ends at Faraka in West Bengal.