A power operated chaff cutter with a mean cutting radius of 0.25 m is fitted with two cutting knives and is rotating at 300 rpm. Thirty maize stalks with a mean diameter of 12 mm are fed through the throat at a time. The dynamic shear strength of the stalk is 0.05 N mm^-2. The mass and radius of gyration of the flywheel including knives are 40 kg and 0.27 m, respectively. The total shaft power requirement in kW is _______. (rounded off to 2 decimal places)