A 20 cm length iron rod is heated at one end to 100°C while the other end is kept at temperatures of 30°C. The area of cross section of the iron rod is 0.685 cm^2. Assume that the iron rod is thermally insulated. Calculate the amount of heat conducted through the rod in 10 min, given the thermal conductivity of the iron (k) = 62 Wm^-1K^-1.