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Example #1
The volume of 4 trenches 100 feet long, 3 feet wide and 6 feet deep are equal to 7200 cubic feet.
The volume of one trench 20 feet long, 3 feet wide and 6 feet deep is equal to 360 cubic feet.
Total: 7200+ 360 = 7560 cubic feet:
Example #2
The volume of 2 trenches 250 feet long, 2 feet wide and 6 feet deep are equal to 6000 cubic feet.
The volume of one trench 20 feet long, 3 feet wide and 6 feet deep is equal to 360 cubic feet.
Total: 6000+ 360 = 6360 cubic feet:
In addition we have to keep in mind an excavator productivity - about 3,000 cubic feet per hour:
Q = (60*q*z*n*kf) / kl = (60*10*1*5*1) / 1 = 3,000 cubic feet per hour.
http://www.ehow.com/how_7995132_calculate-excavator-productivity.html
http://www.most.gov.mm/techuni/media/CE_05012_14.pdf
Maximum volume per hour (68 cycle X 33 cu ft) / 27 = 83 lcy
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