In a single pass rolling operation, the thickness of a 100 mm wideplate 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 $$\frac{\pi}{3}$$

B

$$10 \pi $$

C

40 $$\frac{\pi}{3}$$

D

20 $$\frac{\pi}{3}$$