The standard time of an operation has been calculated as 10 min. The w...
Given Information:
The standard time of an operation is 10 min.
The worker is rated at 80%.
The relaxation and other allowances are 25%.
Calculation:
To find the observed time, we need to consider the worker's rating and the allowances.
Worker's Rating:
The worker is rated at 80%, which means the worker performs at 80% efficiency compared to the standard time.
80% of the standard time = 0.8 * 10 min = 8 min
Allowances:
The relaxation and other allowances are 25% of the standard time.
25% of the standard time = 0.25 * 10 min = 2.5 min
Observed Time:
The observed time is the sum of the worker's rating and the allowances.
Observed time = Worker's rating + Allowances = 8 min + 2.5 min = 10.5 min
Since the observed time is equal to 10.5 min, the closest option is 10 min (option B).
Therefore, the correct answer is option B) 10 min.