Q 60. In a wire drawing operation, diameter of a steel wire is reduced from 10 mm to 8 mm. The mean flow stress of the material is 400 MPa. The ideal force required for drawing (ignoring friction and redundant work) is:
(A) 4.48 kN
(B) 8.97 kN
(C) 20.11 kN
(D) 31.41 kN
Answer: (B)
Explanation:
