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A piece of ice falls from a height h so ...

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 heat during its fall. The value of h is (Latent heat of ice is `3.4 xx 10^(5)` J/kg and g = 10N/kg)

A

68 km

B

34 km

C

544 km

D

136 km

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