A manufacturing company has awarded a contractor a contract for the construction of a large paved area that will be used for storage of shipping containers. The project design calls for the construction of 254 mm soil cement covered with 150 mm of asphalt. The contract specifies that the cement content of the soil cement is to be 8% of the soil dry unit weight. The granular fill material that is to be used for the soil cement weighs 917 Kgs per loose cubic meter at moisture content of 3%. The contractor has decided to use a rotary mixer to mix the cement with the soil. The cutting width of the machine is 2.4m, and the cutting depth is 254mm. The average travel speed of the machine while stabilizing the soil will be 9.14 m per minute. The contractor plans an operational efficiency of 50 minutes per hour.

•a. What is the estimated productivity of the rotary mixer in square yards perhour?

•b. What is the estimated productivity of the rotary mixer in bank cubic yards perhour?