Answer:
80%
Step-by-step explanation:
the average labor utilization rate is calculated by dividing total labor time applied by the addition of total labor time applied plus idle time. In this case, total labor time applied is 40 minutes and idle time is 10 minutes:
average labor utilization rate = 40 minutes / (40 + 10 minutes) = 40 / 50 = 0.8 = 80%