$18$ A $2-$cy dragline with a standard short boom is operated at $60\%$ optimum

depth of cut and a $75-$degree angle of swing. It is used to excavate moist

$10$am$.$ The average bucket load, expressed in bcy$,$ can be taken to be $0\mathrm{.}85$

of the struck capacity, cubic feet listed, as listed in Table $9\mathrm{.}16.$ On the

assumption that the data from Tables $9\mathrm{.}14$ and $9\mathrm{.}15$ are applicable,

calculate the peak rate cycle time for the dragline in minutes.