google is no help
Which of the following formulas is the correct formula for determining the
time to make one cut across a given distance? {T = time f = feed (IPR)
L = length of cut (inches) N = spindle speed (RPM)}
a) T = (fN) / L
b) T = f / NL
c) T = L / (fN)
d) T = (Lf) / N