A liquid stream, F, containing A and B is fed to a distillation column. The total feed flow is 800 moles Reflux is to be operated at 1.8 x Rmin

Mole fraction of A in the feed is 0.3 ; A is the more volatile component 0.3 mole fraction of the feed is vaporized The distillate is to contain 0.94 of A; The bottoms is to contain 0.06 of A The K values of the components are: A 11.4 ; B 3.2