Answer: Annual rate of return = 24%.
Explanation:
Given that,
oil well will increase annual revenues by $130,000 and will increase annual expenses by $70,000 including depreciation
Cost of oil well = $490,000
$10,000 salvage value at the end of its 10-year useful life
Net Income = Annual revenue - annual expenses
= 130000 - 70000
= $60000
Average investment = [tex]\frac{490000+10000}{2}[/tex]
= $250000
∴ Annual rate of return = [tex]\frac{Net\ Income}{Average\ Investment} \times 100[/tex]
= [tex]\frac{60000}{250000} \times 100[/tex]
= 24%