A property has an estimated remaining economic life of 25 years and an effective age of 20 years. What is the total economic life?
Correct Answer
D) 45 years
Why this is correct: Total Economic Life (TEL) is the sum of a property's Effective Age (EA) and its Remaining Economic Life (REL). The formula is: TEL = EA + REL. Given EA = 20 years and REL = 25 years, the calculation is: TEL = 20 + 25 = 45 years. This represents the entire useful life expectancy of the improvements from when they were new. Why the other choices are wrong: "5 years" is the difference between remaining life and effective age (25 - 20), not the sum. "25 years" is the remaining economic life. "20 years" is the effective age. Exam tip: The age-life equation is fundamental: Total Life = Effective Age + Remaining Life. You can solve for any one part if you know the other two.
Why This Is the Correct Answer
Option C is correct because total economic life is calculated by adding effective age plus remaining economic life. The formula is straightforward: Total Economic Life = Effective Age + Remaining Economic Life. In this problem, 20 years (effective age) + 25 years (remaining economic life) = 45 years total economic life. This represents the complete useful lifespan of the property from when it was new until it reaches the end of its economic utility.
Why the Other Options Are Wrong
The Life Timeline Addition
Think of a person's life: Past + Future = Total Life. Effective Age (past) + Remaining Economic Life (future) = Total Economic Life. Visualize a timeline where you add what's already lived to what's left to live.
How to use: When you see age-life questions, immediately identify which two components you have and remember that Total = Past + Future. Draw a simple timeline if needed: [Effective Age]---[NOW]---[Remaining Life] = [Total Life]
Exam Tip
Always write down the formula: Total Economic Life = Effective Age + Remaining Economic Life. Double-check that your answer makes logical sense - the total should always be larger than either individual component.
Common Mistakes to Avoid
- -Confusing effective age with chronological age
- -Subtracting instead of adding the two components
- -Using remaining economic life as the total economic life
Concept Deep Dive
Analysis
This question tests understanding of the age-life method components used in depreciation calculations. The age-life method requires appraisers to understand three key time periods: effective age (how old the property appears based on condition and maintenance), remaining economic life (how many useful years are left), and total economic life (the entire useful lifespan from new to obsolete). These concepts are fundamental to calculating accrued depreciation using the formula: Depreciation = (Effective Age ÷ Total Economic Life) × Replacement Cost New. Understanding the relationship between these three time periods is essential for accurate property valuation.
Background Knowledge
The age-life method is one of three approaches to estimate accrued depreciation in the cost approach to value. Appraisers must distinguish between chronological age (actual years since construction), effective age (apparent age based on condition), and economic life concepts (useful lifespan for income production). Understanding these relationships is crucial for accurate depreciation calculations in residential and commercial appraisals.
Real-World Application
When appraising a 20-year-old office building that appears well-maintained (effective age 15 years) with 30 years of remaining economic life, the total economic life would be 45 years. This information helps determine that the building has experienced 33% depreciation (15÷45), which directly impacts the final value estimate in the cost approach.
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