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A certain mass of a solid exists at its ...

A certain mass of a solid exists at its melting temperature of `20^(@)C`. When a heat Q is added `(4)/(5)` of the material melts. When an additional Q amount of heat is added the material transforms to its liquid state at `50^(@)C`. Find the ratio of specific latent heat of fusion (in `J//g`) to the specific heat capacity of the liquid (in `J g^(-1) .^(@)C^(-1)`) for the material.

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