The quantity of water required to irrigate one hectare area with 4 cm deep water is

Correct option is A

• Area = 1 hectare = 10,000 m²
• Depth = 4 cm = 0.04 m
• Volume = Area × Depth = 10,000 × 0.04 = 400 m³ = 400,000 liters
So, option (a) is correct assuming formatting indicates 400,000 liters written as 40.0000 (European notation).