Chemical Equilibrium

A mixture of 1 mole of H2O and 1 mole of CO is taken in a 10 litre container and heated to 725K. At equilibrium 40% of water by mass reacts with carbon monoxide according to the equation : CO(g)+H2O(g)⇌ CO2(g)+H2(g). The equilibrium constant Ke×102 for the reaction is ________ (Nearest integer)