A large block of steel is initially at 35°C. The surface temperature is suddenly raised and maintained at 250°C. Calculate the temperature at a depth of 2.5 cm after a time of 30 seconds. The thermal...

A large block of steel is initially at 35°C. The surface temperature is suddenly raised and maintained at 250°C. Calculate the temperature at a depth of 2.5 cm after a time of 30 seconds. The thermal diffusivity and thermal conductivity of steel are 1.4 x 10-5m2/s and 45 W/mK respectively.