A' thermacole' icebox is a cheap and an efficient method for storing small quantities of cooked food in summer in particular. A cubical icebox of side 30 cm has a thickness of `5.0 cm. "if "4.0 `kg of ice is put in the box, estimate the amount of Ice remaining after 6 h. The outside temperature is `45^(@) C` and co-efficient of thermal conductivity of thermacole is `0.01 J s^(-1) m^(-1) K^(-1)`. [Heat of fusion of water ` = 335 xx 10^(3) J kg^(-1) `]

Explanation

`3.7 kg`