A spur gear has a module of 2 mm and 30 teeth, rotating at 200 rpm. What will be its circular pitch in mm?

A spur gear has 30 teeth and rotates at 300 rpm. Determine the circular pitch of the gear if its module is 4 mm.

A pinion having a 20° full-depth involute profile has 19 teeth and the meshing gear has 37 teeth. If the module is 5 mm, the center distance between the gear pair will be: