An ice box used for keeping eatables cool has a total wall area of 1m^2 and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K=0.01 J/m degree C. It is filled with large amount of ice at 0 degree C along with eatables on a day when the temperature is 30 degree C The latent heat of fusion of ice is 334 x 10^3 J/kg. The amount of ice melted in one day is ( 1 day = 86,000s)