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A piece of ice falls from a heighth so t...

A piece of ice falls from a heighth 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 height from which ice fall .
[Latent heat of ice is `3.4 xx 10^(5) J//kg` and g = 10 N/kg]

A

68 km

B

34 km

C

544 km

D

136 km

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