Heat is lost at a rate of 275 W per m2 area of a 15-cm· thick wall with a thermal conductivity of k= 1.1 W/m·K. The temperature drop across the wall is
(a) 37.5°C
(b) 27.5°C
(c) 16.0°C
(d) Q8.0°C
(e) 4.0°C
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