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				| 1. | Consider a 1.2 m thick slab of poured concrete (k = 1.148 W/m degree) with both of side surfaces maintained at a temperature of 20 degree Celsius. During its curing, chemical energy is released at the rate of 80 W/m³. Workout the maximum temperature of concrete | 
| A. | 30.73 degree celsius | 
| B. | 29.73 degree celsius | 
| C. | 28.73 degree celsius | 
| D. | 27.73 degree celsius | 
| Answer» C. 28.73 degree celsius | |