Pressure drop in the granular zone of a blast furnace is 300 mm of water per meter of the bed height. The bed permeability is 0.8 m^4. N^-1.s^-1, The volumetric flow rate of gas per unit area through the bed [in (m^3.s^-1).m^2, rounded off to the nearest integer is __________. Assume Darcy’s law is applicable and g = 9.8 m/s^2. Density of water 1000 k/m^3.