A block of ice of mass 120 g at temperature 0^° C is put in 300 g of water at 25^° C. The x g of ice melts as the temperature of the water reaches…

A block of ice of mass $\displaystyle 120$ g at temperature $\displaystyle 0^{\circ} \mathrm{C}$ is put in $\displaystyle 300$ g of water at $\displaystyle 25^{\circ} \mathrm{C}$. The $\displaystyle x \mathrm{~g}$ of ice melts as the temperature of the water reaches $\displaystyle 0^{\circ} \mathrm{C}$. The value of $\displaystyle x$ is \_\_\_\_. [Use specific heat capacity of water $\displaystyle =4200 \mathrm{Jkg}^{-1} \mathrm{~K}^{-1}$, Latent heat of ice $\displaystyle =3.5 \times 10^5 \mathrm{Jkg}^{-1}$ ]