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A 6-mm-thick stainless steel strip (k = 21W/m*K, rho = 8000 kg/m^3, cp = 570 J/kg*K)exiting an oven at a temperature of 500 deg-Cis allowed to cool within a buffer zone distance of 5 m. To prevent thermal burn to workers who are handling the strip at the end of the buffer zone, the surface temperature of the strip should be cooled to 45 deg-C. If the air temperature in the buffer zone is 15 deg-C and the convection heat transfer coefficient is 120W/m^2*K, determine the maximum speed of the stainless steel strip.

Fig: 1