Gear hobbing produces more accurate gears than milling because in hobbing

Teeth of internal spur gears can be accurately cut in a

The cutting tool are being tried for an operation. Tailors tool life equation for them are as follows
$$\eqalign{ & HSS\,\,tool\,:\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.1}} = 200 \cr & Carbide\,\,tool\,:\,\,\,\,\,\,\,V{T^{0.35}} = 500 \cr} $$
Find out the break even speed above which the carbide tool will be economical.

The following data is available for machining a component on a turret or center lathe: find out the total number of components to be machined to justify the use of turret lathe