2kg of ice at `20^C@` is mixed with 5kg of water at `20^C@` in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water & ice are `1kcal//kg//^@C 0.5`
`kcal//kg//^@C` while the latent heat of fusion of ice is `80kcal//kg`