A pair of bevel gears connects two shafts at right angles and transmits 9 kW. It consists of a 20 teeth pinion meshing with a 100 teeth gear. The pinion rotates at 1200 rpm and the gear rotates at 600 rpm. The pinion as well as the gear is made of steel with static stress of 200 MPa. Determine the required module for the following specifications: Assuming the face width b as 1/3rd of the length of the pitch cone element L. Assume the service factor as C, 1. The tooth form can be taken as y= 0.124-0.684/T, and the velocity factor as C,-6/(6+v).