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# Consider the extrusion of a cylindrical billet. assume the starting billet to have a length of 0.3 m and a diameter of 15 cm. this is extruded into a cylindrical product that is 3 cm in diameter and 7.5 m long (a reduction ratio of 25). neglecting the areas on the two ends, compute the ratio between the product surface area (wrap around cylinder) and the surface area of the starting billet. (2 points)

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