Large, cylindrical bales of hay used to feed livestock in the winter months are 2 m in diameter and are stored end-to-end in long rows. Microbial energy generation occurs in the hay and can be excessive if the farmer bales the hay in a too-wet condition. Assuming the thermal conductivity of baled hay to be 0.04 W/m·K, determine the maximum steady-state hay temperature for (a) dry hay ( 1 W/m3 ), (b) moist hay ( 10 W/m3 ), and (c) wet hay ( 100 W/m3 ). Ambient conditions are [infinity] 0°C and 25 W/m2·K.