A concrete wall of thickness 15 cm has inside temperature 25°C and ou – McqOptions

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1.	A concrete wall of thickness 15 cm has inside temperature 25°C and outside temperature 5°C. The rate of heat loss through per square metre of the wall (thermal conductivity 0.81 J/(s m K)) is:
A.	54 J/s
B.	163 J/s
C.	120 J/s
D.	108 J/s
Answer» E.

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