In a cylindrical turning process, the workpiece diameter is 50mm. The feed per revolution and depth of cut are set as 0.5 mm/rev and 0.6 mm respectively. If a minimum MMR of 45,000mm³/min must be maintained. What is the minimum spindle speed in revolutions per minute?
a. 1,254 rpm
b. 956 rpm
c. 765 rpm
a. 1,254 rpm
b. 956 rpm
c. 765 rpm