An 11 ft radius tank contains an agitator with 5 blades measuring 3 ft radius that are located one diameter above the bottom of the tank. It rotates at 1.82 rev/s. It is desired to use a pot to process a mango pulp. The final liquid height of the tank is 7 ft, the pulp density is 73 Lb/ft3 and the viscosity is 5.4 x 10-4 lb/ft.s. What is the power (ft (lbf) / s) required by the motor to stir the pulp without melting it, if the Np is 5.