The cutting speed will be

Question

For a shaper, the length of stroke is 210 mm, the number of double strokes per minute is 32 and the ratio of return time to cutting time is 2 : 3. The cutting speed will be                           

         (a) 8.1 m/min                  (b) 11.2 m/min

         (c) 14.3 m/min                (d) 17.4 m/min