For a steel alloy it has been determined that a carburizing heat treatment of 12h duration at 820C will raise the carbon concentration to 0.36wt% at a point 3.7mm from the surface. Estimate the time necessary to achieve the same concentration at a 8.5mm position for an identical steel and at a carburizing temperature of 1080C. Assume that D0 is 2.6105m2/s and Qd is 129kJ/mol