$5\mathrm{.}4.$ The volume of a steady$-$state crystallizer is $85,000L,$ and the solids fraction in the unit and the exiting stream is $0\mathrm{.}35$ ; that is$,$ there are $0\mathrm{.}35kg$ of crystals per kg of slurry $($the crystal$-$solution mixture$).$ The density of the solution is $1\mathrm{.}1\frac{g}{m}L$ and that of the crystals is $2\mathrm{.}3\frac{g}{m}L.$ The production rate of crystals from the crystallizer is $19\mathrm{.}5kg$ crystals $\frac{?}{\text{m}\text{i}\text{n}}.$ Estimate the volumetric flow rate of slurry from the crystallizer and the drawdown time of the crystallizer $($the time it would take to empty the crystallizer if the feed were discontinued$).$