The thickness of ice in a lake is 10 cm and its temperature is -10^(0)C. The thermal conductivity of ice = 0.004 cal cm^(-1)" sec"^(-1)""^(0)C^(-1). Density of ice = 0.92 g/cc, latent heat of ice = 80 cal/g. The time taken for thickness of ice to be doubled is

The thickness of ice in a lake is 10 cm and its temperature is -10^(0)

1.	The thickness of ice in a lake is 10 cm and its temperature is -10^(0)C. The thermal conductivity of ice = 0.004 cal cm^(-1)" sec"^(-1)""^(0)C^(-1). Density of ice = 0.92 g/cc, latent heat of ice = 80 cal/g. The time taken for thickness of ice to be doubled is
Answer» `10^(6)` second `2.75xx10^(5)` second `10^(4)` second `9.2xx10^(5)` second ANSWER :B