Multiple Choice Question (MCQ)

Question: What is the formula to calculate cutting speed (v) in m/min.?
A. V=(Pi x d)/(n x 1000)
B. V=(d x n)/(Pi x 1000)
C. V=(Pi x n)/(d x 1000)
D. V=(Pi x d x n)/(1000)
Correct Answer: V=(Pi x d x n)/(1000)