Question $4(10$ points$)$

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How long will it take $($in years$)$ to fill Cobb County with a $25-ft(7\mathrm{.}62-m)$ depth of solid waste? The waste will come from all over the county with a population of $766,802.$ Assume average solid waste generation rate as $5\mathrm{.}73l\frac{b}{?}$ capita$/$day$(2\mathrm{.}6k\frac{g}{c}at\frac{a}{d}ay,$ bulk density of solid waste as $371l\frac{b}{y}{d}^3(220\frac{kg}{m^3}),$ and the area of Cobb County as $345$ square mile $(890$ sq$.$ km$).$

$2500$ years

$2195$ years

$2060$ years

$1500$ years