Estimate the time $($in hours$)$ for a dragline to excavate a trench $($volume $=37,000BCM)$ based on the

following information:

Bucket size: $0\mathrm{.}94$ BCM

Depth of cut $=4\mathrm{.}8m$

Angle of swing $=75$

Soil type: wet sticky clay

Efficiency $=50mi\frac{n}{h}=\frac{50}{60}=0\mathrm{.}833$