$30\; gm$ ice at $\;-20^{0}C\;$ is mixed with $20\; gm$ water at $\;90^{0}C\;$. Find the final composition and temperature of mixture . (Latent Heat of fusion $80\; cal /gm$ )

Question

$(a)\;50 \;gm \;water\;at\;40^{0}C\qquad(b)\;50 \;gm \;water\;at\;-40^{0}C\qquad(c)\;50\; gm\;water\;at\;0^{0}C\qquad(d)\;None$