Water $)$ enters a $0\mathrm{.}12-$ m $-$diameter and $8\mathrm{.}25-$m$-$long tube at $75C$ at a rate of $0\mathrm{.}35k\frac{g}{s},$ and is cooled by a refrigerant evaporating outside at $-10C.$ If the average heat transfer coefficient on the inner surface is $500\frac{W}{m^2}C,$ what is the exit temperature of water?

$C$