A piece of ice falls from a height `h` so that it melts completely. Only one-quarter of the heat produced is absobed by the ice

A piece of ice falls from a height `h` so that it melts completely. Only one-quarter of the heat produced is absobed 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 xx 10^(5) J//kg` and `g = 10 N//kg`]
A. 544 km
B. 136 km
C. 68 km
D. 34 km

A piece of ice falls from a height `h` so that it melts completely. Only one-quarter of the heat produced is absobed by the ice and all energy of ice

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