Answer (B) is correct . Each unit requires 20 minutes of assembly time, or 1/3 of an hour. The assembly of 1,800 units will therefore require 600 hours of labor (1,800 ¡Á 1/3). At 40 hours per week for 4 weeks, each employee will work 160 hours during the month. Thus, 3.75 employees (600 ¡Â 160) are needed.Answer (A) is incorrect because This number of employees assumes production occurs in a single 40-hour week. Answer (C) is incorrect because This number of employees assumes that each leg requires 20 minutes to assemble and that production occurs in a single 40-hour week. Answer (D) is incorrect because This number of employees is the number of hours needed, not the number of employees.
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