A cubical thermocole ice box of side 20 cm has a thickness 5 cm. If 5 kg of ice is put in…
Physics · Class 11 · CBSE — Thermal Properties of Matter
A cubical thermocole ice box of side 20 cm has a thickness 5 cm. If 5 kg of ice is put in the box, the amount of ice remaining after
10 hours is
(The outside temperature is 50°C coefficient of thermal conductivity of thermocole = 0.01 J s–1 m–1 °C–1, latent heat of fusion of ice = 335 × 103 J kg–1)
- 3.7 kg
- 3.9 kg
- 4.7 kg
- 4.9 kg
Answer
(B) 3.9 kg
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