GATE Civil Engineering (CE) 2022 Shift 1 Solved Paper

During a particular stage of the growth of a crop, the consumptive use of water is 2.8 mm/day. The amount of water available in the soil is 50 % of the maximum depth of available water in the root zone. Consider the maximum root zone depth of the crop as 80 mm and the irrigation efficiency as 70 %.
The interval between irrigation (in days) will be _________. (round off to the nearest integer)