Material Removal Rate (MRR)

Q. A steel bar $200mm$ in a diameter is turned at a feed of $0.25mm/rev$ With a depth of cut of $4mm$ The rotational speed of the workpiece is $160rpm$. The material removal rate in $m{m}^3/s$ is

1. $160$
2. $167.6$
3. $1600$
4. $1675.5$