An arc welding operation is used to create a butt joint with groove weld between two steel plates (melting temperature =1515° or 1788). The welding voltage at the source is 32 volts and its current is 118amps. The heat transfer factor is 0.92 and the melting factor is 0.75 . A filler metal of the same type as the base metal is added to the weld, and its wire diameter is 2.2. The final weld bead is composed of 55% volume of filler and 45% volume base metal.

Determine the travel speed of the welding operation, knowing the cross-sectional area of the groove weld bead generated at the joint is 15mm²