Multiple choice In 1973, how many hectare-metres of water was used for irrigation? 9.7 million hectare-metres 10.9 million hectare-metres 18.4 million hectare-metres 21.3 million hectare-metres Reveal answer Fill a bubble to check yourself C Correct answer Explanation By 1973, India's irrigation capacity had nearly doubled from 1951 levels, reaching 18.4 million hectare-metres. This growth reflects the success of major multipurpose river valley projects commissioned during the 1950s-1960s.