In a single pass rolling operation, the thickness of a 100 mm wide plate is reduced from 20 mm to 15 mm. The roller radius is 125 mm and rotational speed is 8 rpm. The average flow stress for the plate material is 400 MPa. The power required for rolling operation in kW is?
- A. 12.5 pi/3
- B. 10 pi
- C. 40 pi/3
- D. 20 pi/3
Answer: D. 20 pi/3