railway RRB JE (CBT I + CBT II) Mock Test 2024 Hydrology Basic Principles and Introduction

पृथ्वी की सतह पर जल की कुल मात्रा लगभग कितनी है?

1
145 × 106 km3
2
1400 × 106 km3​
3
1455 × 106 km3​
4
1455 × 106 km2​
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