steel casting $(40)$ witn nign$-$speed arili. compare

your answer with the speed given in table $41\mathrm{.}1$

$\backslash$table$[[$table $41\mathrm{.}1$ Speeds for high$-$speed steel drills$*],[,,\backslash$table$[[$Steel$],[$Casting$]],\backslash$table$[[$Tool$],[$Steel$]],\backslash$table$[[$Cast$],[$Iron$]],\backslash$table$[[$Machine$],[$Steel$]],\backslash$table$[[$Brass and$],[$Aluminum$]]],[$Drill Size,Cutting Speeds in Feet per Minute or Meters per Minute$],[$in$.,$mm$,\backslash$table$[[40],[$ft$/$min$]],12$

$\frac{m}{m}in,60$

$ft\frac{t}{m}in,\backslash$table$[[18],[$m$/$min$]],\backslash$table$[[80],[$ft$/$min$]],\backslash$table$[[24],[$m$/$min$]],\backslash$table$[[100],[f\frac{t}{m}in$