calculate heat input per unit length and area of cross-section of weld bead

Question

A weld is made using mIG welding process with the following welding parameters: Current:200A; Voltage:25V; Welding speed: 18 cm/min; wire diameter: 1.2 mm; Wire feed rate:4m/min; Thermal efficiency of the process: 65%

1. The heat input per unit length of the weld in kJ/cm is:

(a) 0.18                               (b) 0.28

(c) 10.83                             (d) 16.66

 

2. The area of cross section of weld bead in mm² is:

(a) 16.3                               (b) 25.1

(c) 303                                (d) 38.6