On a Cold Winter Day, the Outside Temperature Is -5

Multiple Choice

On a cold winter day, the outside temperature is -5.0 °C while the interior of a well-insulated garage is maintained at 20.0 °C by an electric heater. Assume the walls have a total area of 75 m², a thickness of 0.15 m, and a thermal conductivity of 0.042 W/(m · C°) . What is the cost to heat the garage for six hours at these temperatures if the cost of electricity is $ 0.11/kWh? Note: 1 kWh = 3.6 × 10⁶ J.

A) $ 0.18
B) $ 0.44
C) $ 0.61
D) $ 0.35
E) $ 1.09