Tool life of 10 hrs is obtained when cutting with single point tool at 63 m/min. If Taylor’s constant C = 257.35, tool life on doubling the velocity will be

Tool life of 10 hrs is obtained when cutting with single point tool at

1.	Tool life of 10 hrs is obtained when cutting with single point tool at 63 m/min. If Taylor’s constant C = 257.35, tool life on doubling the velocity will be
A.	5 hrs
B.	25.7 min
C.	38.3 min
D.	No change
Answer» C. 38.3 min