A 15-cm-long, 15-cm-diameter cylinder made of steel initially at 400°C is suddenly exposed to a surrounding fluid at 30°C with convective heat transfer coefficient, h = 300 W/m²-C. What are the highest and lowest temperatures inside the cylinder after 3 min? after 30 min? Where are the highest and lowest temperatures? 5. Repeat question 4 for a steel cube of length 15 cm.
