Continuous tubing is produced in a plastic extrusion operation through a die orifice whose outside diameter = 2

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Continuous tubing is produced in a plastic extrusion operation through a die orifice whose outside diameter = 2.5 in and inside diameter = 2.0 in. The extruder barrel diameter = 5.0 in and length = 10 ft. The screw rotates at 60 rev/min; it has a channel depth = 0.30 in and flight angle = 16°. The head pressure has a value of 700 lb/in2 and the viscosity of the polymer melt is 90 x 10?4 lb?sec/in2. A die swell ratio of 1.20 is observed in the extrudate. Under these conditions, determine (a) the outside and inside diameters of the final tubing and (b) the production rate in length of tube/min.