Which of the following methods can be used for manufacturing 2 meter long seamless metallic tubes?

Which of the following methods can be used for manufacturing 2 meter long seamless metallic tubes? Correct Answer Extrusion and rolling

Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed through a die of the desired cross-section.
rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform.
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