A 3500` long canal trench is excavated to 7` depth. The trench has a 3`-6″ wide base. Sides are scoped at 1:1. Each hoe excavates 27.5 cy/hr, soil expands 20%. What range of hrs is estimated to excavate the trench with the power hoe?

A 3500` long canal trench is excavated to 7` depth. The trench has a 3`-6″ wide base. Sides are scoped at 1:1. Each hoe excavates 27.5 cy/hr, soil expands 20%. What range of hrs is estimated to excavate the trench with the power hoe?