Question

Why does the rainfall decreases from east to west in northern India?

Answer 1

Monsoonal winds enter through north east (that's why Assam receives much rainfall) and by the time they reach western parts, they're almost dry

Answer 2

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$<b>$The Baynof Bengal branch of South-west monsoon moves towards north east carrying more moisture and they give heavy rainfall in this region. As they move towards west, they carry less moisture and many turns into snow due to Himalayan mountains resulting in decrease in rainfall in West.

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