A Glass Tea Kettle Containing 500 G of Water Is

A glass tea kettle containing 500 g of water is on top of the stove. The portion of the tea kettle that is in contact with the heating element has an area of 0.090 m² and is 1.5 mm thick. At a certain moment, the temperature of the water is 75°C, and it is rising at the rate of 3 C° per minute. What is the temperature of the outside surface of the bottom of the tea kettle? The thermal conductivity of glass is 0.840 W/(m·K) . Neglect the heat capacity of the kettle.

A) 39°C
B) 92°C
C) 120°C
D) 86°C
E) 77°C