At What Rate Is Heat Lost Through a 1

Multiple Choice

At what rate is heat lost through a 1.5 m × 3.0 m rectangular glass windowpane that is 0.4 cm thick when the inside temperature is 22 °C and the outside temperature is 6.0 °C? The thermal conductivity for the glass is 0.75 W/(m · C°) .

A) 560 W
B) 1800 W
C) 7200 W
D) 3600 W
E) 13 500 W