A contractor has to move 15 300 Bank m³of wet sandy material in rear dump trucks, which will be loaded by an excavator. Average face depth will be 2.4 m with 60-90 degree average swing angle. Ten days are available to do the work. The Contractor plans to work 10 hours/day and estimates a 50 min. work hour (83% job efficiency). There are two excavators that could be made available to do the work: Excavator A (320) with 1.0 m³bucket or Excavator B (336) with 1.9 m³bucket.

If the swell factor is 25%, calculate the total volume of loose material to be moved.

Calculate the required productivity.

Propose a fill factor and justify it.

Estimate the actual bucket payloads (actual amount of material in the bucket).

Could this job be done with either machine or will the excavator B have to be used?