If the elongation factor during rolling of an ingot is 1.22. The minimum number of passes needed to produce a section 250 x 250 mm from an ingot of 750 750 mm are

If the elongation factor during rolling of an ingot is 1.22. The minim

1.	If the elongation factor during rolling of an ingot is 1.22. The minimum number of passes needed to produce a section 250 x 250 mm from an ingot of 750 750 mm are
A.	8
B.	9
C.	10
D.	12
Answer» D. 12

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If the elongation factor during rolling of an ingot is 1.22. The minimum number of passes needed to produce a section 250 x 250 mm from an ingot of 750 750 mm are

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