Answer:
Both projects should be accepted as their cash-flow 's present values are all positive once they are discounted at WACC rate.
Step-by-step explanation:
To find whether one or both projects should be accepted, we have to calculate the present value of the two cash-flows each project generates. Besides, both projects have the same risk characteristics as the firm's average project, WACC should be used as a discount rate.
- Project L present value (in thousands of dollars) = -100 + 10/1.1^1 + 60/1.1^2 + 80/1.1^3 = $18.783
- Project S present value (in thousands of dollars) = -100 +70/1.1 + 50/1.1^2 + 20/1.1^3 = $19.985
As both projects generate positive discounted cash-flow, both of them should be accepted.