
(a)
The best alternative based on payback period.

Answer to Problem 50P
The Alternative- C should be selected.
Explanation of Solution
Write the Equation for Payback period.
Calculate the Payback period for Alternative-A.
Substitute
Calculate the Payback period for Alternative-B.
Substitute
Calculate the Payback period for Alternative-C.
Substitute
Calculate the Payback period for Alternative-D.
Substitute
The Alternative that has minimum value of Payback period should be selected.
Conclusion:
Therefore, the Alternative- C should be selected.
(b)
The best alternative based on Future worth analysis.

Answer to Problem 50P
The Alternative- B should be selected.
Explanation of Solution
Calculate the net future worth for alternative-A.
Here, the net future worth is NFW, the
Calculate the factor
Calculate the factor
Substitute
Calculate the net future worth for alternative-B.
Substitute
Calculate the net future worth for alternative-C.
Substitute
Calculate the net future worth for alternative-D.
Substitute
The Alternative that has maximum value of Future worth should be selected.
Conclusion:
Therefore, the Alternative- B should be selected.
(c)
The best alternative based on B/C ratio analysis.

Answer to Problem 50P
All Alternatives should be selected except A.
Explanation of Solution
Calculate the factor
Write the equation for B/C ratio.
Calculate EUAB for Alternative-A.
Substitute
Calculate the B/C ratio for Alternative-A.
Substitute
Calculate EUAB for Alternative-B.
Substitute
Calculate the B/C ratio for Alternative-B.
Substitute
Calculate EUAB for Alternative-C.
Substitute
Calculate the B/C ratio for Alternative-C.
Substitute
Calculate EUAB for Alternative-D.
Substitute
Calculate the B/C ratio for Alternative-C.
Substitute
Conclusion:
Therefore, all Alternatives should be selected except A.
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Chapter 9 Solutions
ENGINEERING ECO ANALYSIS W/STUDY GUIDE
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