Estimate the machining time that will be required to finish a vertical flat surface of length 100 mm and depth 20 mm byan 8 teeth HSS (High speed steel) end mill cutter of 32 mm diameter and 60 mm length in a milling machine. Assume cutting velocity $$(V_c) = 30 m/min$$ and feed $$(s_0) = 0.12$$ mm/tooth. Take approach and run over both 2 mm

A

0.4 minutes

B

0.6 minutes

C

0.8 minutes

D

1.0 minutes