Find the work $($in ft $-$lb$)$ required to pump all the water out of a cylinder that has a circular base of radius $4$ ft and height $300$ ft $.$ Use the fact that the weight$-$density of water is $\backslash (62\mathrm{.}4\backslash$mathrm$\{$lb$\}/\backslash$mathrm$\{$ft$\}^\{3\}\backslash ).$

ft$-$lb

Find the work $($in ft $-$lb$)$ required to pump all the water out of the cylinder if the cylinder is only half full.

ft$-$lb