A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through-hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is

A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate

1.	A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through-hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
A.	0.2 mm
B.	10 mm
C.	20 mm
D.	100 mm
Answer» D. 100 mm