Given:
Initial value = 25,000
depreciation = 15% per annum based on net book value
Net book value = 25,000 (1 - 0.15)^t
where t is the number of years
NBV = 25,000 (0.85)^5
NBV = 25,000 (0.4437)
NBV = 11,092.50
The approximate value of the car 5 years from date of purchase is 11,092.50
