Question

what is the south border of Deccan plateau
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Answer 1

Answer:

The plateau is located between two mountain ranges, the Western Ghats and the Eastern Ghats, each of which rises from its respective nearby coastal plain, and almost converge at the southern tip of India.

Answer 2

Answer:

Deccan, the entire southern peninsula of India south of the Narmada River, marked centrally by a high triangular tableland. The name derives from the Sanskrit daksina (“south”). The plateau is bounded on the east and west by the Ghats, escarpments that meet at the plateau's southern tip.