A building has an actual age of 25 years and an effective age of 20 years. If the total economic life is estimated at 60 years, what is the remaining economic life?
Correct Answer
B) 40 years
Remaining economic life is calculated using effective age, not actual age. With a total economic life of 60 years and effective age of 20 years, the remaining economic life is 60 - 20 = 40 years.
Why This Is the Correct Answer
Option B is correct because remaining economic life is calculated by subtracting effective age from total economic life, not actual age. The effective age of 20 years represents the building's functional condition relative to a new building. With a total economic life of 60 years, the calculation is 60 - 20 = 40 years of remaining economic life. This reflects how much useful life the building has left based on its current condition and functionality.
Why the Other Options Are Wrong
Option A: 35 years
Option A incorrectly uses actual age in the calculation (60 - 25 = 35 years), which fails to account for the building's better-than-expected condition reflected in its lower effective age.
Option C: 45 years
Option C appears to add the difference between actual and effective age to the correct answer (40 + 5 = 45), which is mathematically incorrect and conceptually flawed.
Option D: 55 years
Option D incorrectly subtracts effective age from total economic life plus actual age, or uses some other flawed calculation that doesn't follow the standard remaining economic life formula.
EFFECTIVE = REMAINING
Remember 'EFFECTIVE for REMAINING' - Effective age is what matters for calculating remaining economic life. Think: 'The EFFECT of condition determines what REMAINS.'
How to use: When you see remaining economic life questions, immediately identify the effective age (ignore actual age) and subtract it from total economic life. Ask yourself: 'What age EFFECTIVELY matters for the remaining life?'
Exam Tip
Always look for both actual age and effective age in the problem - the presence of both is often a trap to see if you'll use the wrong one in your calculation.
Common Mistakes to Avoid
- -Using actual age instead of effective age in the calculation
- -Confusing the formula and adding instead of subtracting
- -Not understanding that effective age can be different from actual age
Concept Deep Dive
Analysis
This question tests the fundamental concept of remaining economic life calculation in real estate appraisal, specifically the critical distinction between actual age and effective age. Effective age reflects the condition and functionality of a building relative to its chronological age, accounting for maintenance, renovations, and overall care. The remaining economic life calculation always uses effective age because it represents the building's true functional condition, not simply how many years have passed since construction. Understanding this distinction is essential for accurate depreciation calculations and property valuation in the cost approach.
Background Knowledge
Effective age represents a building's condition and functionality relative to its actual chronological age, often differing due to maintenance, renovations, or neglect. Total economic life is the estimated period over which a building contributes to property value, while remaining economic life indicates how much useful life remains based on current condition.
Real-World Application
An appraiser evaluating a 25-year-old office building that has been exceptionally well-maintained with recent HVAC and roof updates might determine it has an effective age of only 20 years, meaning it functions like a newer building and has more remaining economic life than its actual age would suggest.
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