Q 1129191911.     From what height (in meter) must a block of ice be dropped into a well of water so that `5%` of it may melt. Given : both ice and water are at `0^°C` ,

`L = 80` cal `g^(-1)` ,

`J = 4.2` J `cal^(-1)` and

`g = 980` cm `s^(-2)` .

A

`171.4`

B

`17.14`

C

`1714`

D

`1.714`

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