Answer:book value at end of year 5=$188,500.
Step-by-step explanation:
Depreciation per year= (Cost-Salvage value)/Useful life
=(400,000-20,000)/10= $38000 per year
Book value after 4 years, Beginning of year 5= Cost - depreciation x number of years
$400,000 - (38000 x 4)= $248,000
Depreciation per year now= (Cost-Salvage value)/Useful life
($248000-$10,000)/4 = $59,500 per year.
Therefore, book value at end of year 5=Book value at the beginning of year 5 - depreciation
$248,000- $59,500 )= $188,500.