A wet solid whose drying rate curve is shown in the figure below should be dried from X1=0.19 kg H2O/kg dry solids to X2=0.07 kg H2O/kg dry solids. The weight of the dry solid is Ls=200 kg and the drying surface area is A=9.75m^2. Calculate the drying time.

a) 5.29 hours b) 3.20 hours c) 4.80 hours d) 2.59 hours e) 1.20 hours

R(hm2kgHH2O) R(hm2kgHH2O)