(3) A house is having double-pane glass window of dimensions 1.2 m high and 2 m wide. The window consists of two 3 mm thick layers of glass (k -0.78 W/m-C) separated by a 12 mm wide air space having heat transfer coefficient 2 W/mC. The convection heat transfer coefficients at inner and outer surfaces of the window are 10 W/m.C and 25 W/m2.C respectively. Disregard any heat transfer by radiation; determine the rate of heat transfer through the double-pane window when the room is maintained at 24C while the temperature of the outdoors is 35C