A peripheral milling operation is performed on the top surface of a rectangular workpart which is 400 mm long by 60 mm wide. The milling cutter, which is 80 mm in diameter and has five teeth, overhangs the width of the part on both sides. The cutting speed is 70 m/min, the chip load is 0.25 mm ltooth, and the depth of cut is 5.0 mm. Determine
(a) the time to make one pass across the surface, and
(b) the maximum material removal rate during the cut.