The value of C in Taylor’s tool life equation VTn = C would be equal to:

Question

A carbide tool (having n = 0.25) with a mild steel work-piece was found to give life of 1 hour 21 minutes while cutting at 60 m/min. The value of C in Taylor’s tool life equation VTn = C would be equal to:  

(a) 200                            (b) 180

(c) 150                            (d) 100