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2. A contractor has both a 3-cy and a 5-cy shovel in the equipment fleet. Select the minimum size shovel that will excavate 400,000bcy of common earth in a minimum of 130 working days of 5hrs each. The average height of excavation will be 15ft, and the average angle of swing will be 120o. The 3-cy shovel has a maximum digging height of 30ft and the 5-cy machine’s maximum digging height is 34ft. the efficiency factor will be a 45min/hour. Appropriate size haul units can be used with either shovel. How many days will it require to complete the work?

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