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The standard time of an operation has been calculated as 10 min. The worker was rated at 80%. If the relaxation and other allowances were 25%, then the observed time would be: 
  • a)
    12.5 min  
  • b)
    10 min  
  • c)
    8 min  
  • d)
    6.5 min 
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The standard time of an operation has been calculated as 10 min. The w...
Observed time = (Standard time + Allowances) × Rating of worker
= 10 × (1 + 0.25) × 0.8 = 10 
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Most Upvoted Answer
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.
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