Answer:
* Crossover rate is A.11.75%
* At crossover rate, Project B should be chosen.
Explanation:
* Finding the crossover rate:
Denote x is the crossover rate which is the discount rate at which the net present value (NPV) of the two project is the same. So, we have:
NPV Project A = NPV Project B at X discount rate
<=> -27,000 + 10,000/(1+x) + 10,000/(1+x)^2 + 18,000/(1+x)^3 = -27,000 + 18,100/(1+X) + 8,000/(1+x)^2 + 10,120/(1+x)^3 <=> 1+x = 1.1175 <=> x = 11.75%
* Choosing what project to be taken:
For any required return rate that is above crossover rate, we have the NPV of Project B is higher than the NPV of Project A; so Project B should be chosen.