Answer:
The payback period is 4.86 years.
Explanation:
The cost of capital or interest rate is 10%.
The initial investment is $150,000.
The inflows for 4 years is
= [tex]$30,000\ \times\ 4[/tex]
= $120,000
The inflows for the 5th year
= $35,000
The amount of $120,000 will be paid off in 4 years
Payback period
= 4 years + [tex]\frac{\$150,000\ - \ \$120,000}{\$35,000}[/tex]
= 4 years + [tex]\frac{\$30,000}{\$35,000}[/tex]
= 4 years + 0.8571 years
= 4.86 years