A compacted fill is being built with two sheep's-foot drum rollers, 5 ft wide, operating at 1.5 mi/hr. Four passes are required to obtain the 5-in. depth of compacted fill to meet the specifications density. Your company has a spread of 15-cy, loose measure, trucks to haul the fill dirt to the compacted area. Analysis of the soil conditions indicates a 15-cy loose measure truck is equivalent to 10.8-cy compacted measure.
a. if the cycle time of a single truck is 15 min, how many trucks are required?
b. If 140,000 cy of compacted fill are required using the type of compaction drums described, how many drums are required if the project is to be completed in 25 working days?