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. \(\frac{12.5\pi }{3}\)
• B. 10π
• C. \(\frac{40\pi }{3}\)
• D. \(\frac{20\pi }{3}\)