4-54 In a production facility, 3-cm-thick large brass plates (k = 110 W/m-K, p = 8530 kg/m³, c,-96= 380 J/kg-K, and a = 33.9 x 10^-6 m²/s) that are initially

at a uniform temperature of 25°C are heated by passing them through an oven maintained at 700°C. The plates remain in the oven for a period of 10 min. Taking the convection heat transfer coefficient to be h = 80 W/m²-K,determine the surface temperature of the plates when they come out of the oven. Solve this problem using the analytical one-term approximation method. Can this problem be solved using lumped system analysis? Justify your answer.