A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is : [Latent heat of ice is 3.4 10 5 J/kg and g = 10 N/kg]

1. A. 34 km
2. B. 544 km
3. C. 136 km
4. D. 68 km

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