Answer:
The correct option is C.
Step-by-step explanation:
Under straight-line method, depreciation expense is (Cost - Residual value) / No of years = ($55,000 - $5,000) / X years = $5,000 yearly depreciation expense.
Depreciation expense = $50,000/X years = $5,000
$5,000X = $50,000
X = Estimated useful life =$50,000/$5,000 = 10 years
Since accumulated depreciation account at the end of the year is $25,000,
$25,000 / $5,000 = 5 years (total years of depreciation)
Therefore, the remaining useful life is 10 - 5 = 5 years.