The vacuum in a condenser handling \(9000 \mathrm{~kg} / \mathrm{h}\) of steam is found to be \(72 \mathrm{~cm}\) of \(\mathrm{Hg}\) when Barometer reading is \(76 \mathrm{~cm}\) of \(\mathrm{Hg}\) and the temperature is \(25^{\circ} \mathrm{C}\). The air leakage amounts to \(2 \mathrm{~kg}\) for every \(5000 \mathrm{~kg}\) of steam. Determine the capacity of a suitable dry air pump in \(\mathrm{m}^{3} / \mathrm{min}\) required for the condenser. Take volumetric efficiency of the pump as 0.85