Area of field is = 8 Hectare = 8x10,000=80,000 {One hectare= 10,000 m²}
Volume of the rain fall in the field = Area of the field x 5/100 meter3 = 4,000 meter3
1 meter3 = 1000 litres
Volume of the water in the field = 4,000x1000 = 4,000000 litres