Question

difference between eastern and western coastal plains in detail?

Answer 1

Most of the rivers in the southern india drain in eastern coastal plain while few rivers drain in western coastal plain.
eastern plain is longer than that of western coastal plain.
western plains have more mountains that that of eastern plain

Answer 2

$\sf\red{Answer :-}$

These are the main differences between Eastern Coastal and Western Coastal Plains of India.

Eastern Coastal Plain is broader Western Coastal Plains are very narrow

Eastern Coastal plain is a level surface Western Coastal plain is intersected by mountain ridges.