If l=length of travel of the drill in mm, n=rpm of the drill, s= feed per revolution of the drill in mm. Then machining time can be given as_____

If l=length of travel of the drill in mm, n=rpm of the drill, s= feed

1.	If l=length of travel of the drill in mm, n=rpm of the drill, s= feed per revolution of the drill in mm. Then machining time can be given as_____
A.	(l*n)/s
B.	(l*s)/n
C.	l/(n*s)
D.	none of the mentioned
Answer» D. none of the mentioned