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Question: How many hours should it take an articulated wheel loader equipped with a 4-yd (3.06-m3) bucket to load 3,000 cu yd (2294 m3) of gravel from a stockpile into rail cars if the average haul distance is 300 ft (91.5 m) one way? The area is level with a rolling resistance factor of 120 Ib/ton (60 kg/t). Job efficiency is estimated at 50 min/h.

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