A drying process is applied to 10 kg of solid on a dry basis from both sides of flat sheet. Nc = 1.25*10-5 is the drying rate during the period of constant rate drying. The solid has a 0.6 kg moisture/kg dry solid initial moisture content.. The amount of moisture after the drying process is 0.3 kg moisture/kg dry solid. The Area of the flat sheet is given by 1.5m *2m* 15mm.What is the time required for constant rate of drying?