Physics - Heat & Thermo Question with Solution | TestHub

A cubical box is used to keep colddrinks in a bus. Area of each face of cubical box is $0.80{\mathrm{m}}^2$ and each wall has thickness 2.00 cm. It is filled with ice and water which remains at 0°C. Temperature outside each wall is 30°C then: (Thermal conductivity of material of $\mathrm{box}=1\times 10^{-2}\mathrm{w}/\mathrm{m}-\mathrm{k}$ ) (Latent heat of fusion of ice $=3.2\times 10^5\mathrm{J}/\mathrm{kg}$ )