Solutions Manual for Engineering
Fundamentals An Introduction
to Engineering (SI Edition) 7th
Edition By Saeed Moaveni (All
Chapters 1-21, 100% Original
Verified, A+ Grade)
All Chapters Arranged Reverse:
21-1
This is the Original Solutions Manual
for 7th Edition, All Other Files in the
Market are Wrong/Old Questions.
, Solution and Answer Guide: Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
Solution and Answer Guide
Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
End of Section Problem Solutions
Note: Some solutions are not provided due to the nature of the problems.
21.1 Compute the future value of the following deposits made today:
(a) $10,000 at 6.75% compounding annually for 10 years
(b) $10,000 at 6.75% compounding quarterly for 10 years
(c) $10,000 at 6.75% compounding monthly for 10 years
SOLUTION
(a)
F = P (1 + i ) n = 10000(1 + .0675)10 = $19216.70
(b)
i nm 0.0675 (10 )( 4 ) 0.0675 40
F = P (1 + ) = 10000(1 + ) = 10000(1 + ) = $19530.02
m 4 4
(c)
i nm 0.0675 (10 )(12 ) 0.0675 120
F = P (1 + ) = 10000(1 + ) = 10000(1 + ) = $19603.21
m 12 12
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible 21-1
website, in whole or in part.
, Solution and Answer Guide: Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
21.2 Compute the interest earned on the deposits made in Problem 21.1.
SOLUTION
(a) Interest = $19216.70 − $10000 = $9216.70
(b) Interest = $19530.02 − $10000 = $9530.02
(c) Interest = $19603.21 − $10000 = $9603.21
21.3 How much money do you need to deposit in a bank today if you are planning to
have $5000 in four years by the time you get out of college? The bank offers a 6.75%
interest rate that compounds monthly.
SOLUTION
F 5000
P= nm
= ( 4 )(12 )
= $3819.78
i 0.0675
1 + 1 +
m 12
21.4 How much money do you need to deposit in a bank each month if you are planning
to have $5000 in four years by the time you get out of college? The bank offers a
6.75% interest rate that compounds monthly.
SOLUTION
i 0.0675
A=F m = 5000 12 = $91.02
nm ( 4 )(12 )
i 0.0675
1 + − 1 1 + − 1
m 12
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible 21-2
website, in whole or in part.
, Solution and Answer Guide: Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
21.5 Determine the effective rate corresponding to the following nominal rates:
(a) 6.25% compounding monthly
(b) 9.25% compounding monthly
(c) 16.9% compounding monthly
SOLUTION
12
i 0.0625
(a) ieff = (1 + ) m − 1 = 1 + − 1 = 0.0643 or 6.43%
m 12
12
i 0.0925
(b) ieff = (1 + ) m − 1 = 1 + − 1 = 0.0965 or 9.65%
m 12
12
i 0.169
(c) ieff = (1 + ) m − 1 = 1 + − 1 = 0.1827 or 18.27%
m 12
21.6 Using Excel or a spreadsheet of your choice, create interest-time factor tables,
similar to Table 21.9, for i = 6.5% and i = 6.75%.
SOLUTION
The Interest-Time Factors for i = 6.5%
n (F/P, i, n) (P/F, i, n) (P/A, i, n) (A/P, i, n) (F/A, i, n) (A/F, i, n)
1 1.06500000 0.93896714 0.93896714 1.06500000 1.00000000 1.00000000
2 1.13422500 0.88165928 1.82062642 0.54926150 2.06500000 0.48426150
3 1.20794963 0.82784909 2.64847551 0.37757570 3.19922500 0.31257570
4 1.28646635 0.77732309 3.42579860 0.29190274 4.40717462 0.22690274
5 1.37008666 0.72988084 4.15567944 0.24063454 5.69364098 0.17563454
6 1.45914230 0.68533412 4.84101356 0.20656831 7.06372764 0.14156831
7 1.55398655 0.64350621 5.48451977 0.18233137 8.52286994 0.11733137
8 1.65499567 0.60423119 6.08875096 0.16423730 10.07685648 0.09923730
9 1.76257039 0.56735323 6.65610419 0.15023803 11.73185215 0.08523803
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible 21-3
website, in whole or in part.
Fundamentals An Introduction
to Engineering (SI Edition) 7th
Edition By Saeed Moaveni (All
Chapters 1-21, 100% Original
Verified, A+ Grade)
All Chapters Arranged Reverse:
21-1
This is the Original Solutions Manual
for 7th Edition, All Other Files in the
Market are Wrong/Old Questions.
, Solution and Answer Guide: Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
Solution and Answer Guide
Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
End of Section Problem Solutions
Note: Some solutions are not provided due to the nature of the problems.
21.1 Compute the future value of the following deposits made today:
(a) $10,000 at 6.75% compounding annually for 10 years
(b) $10,000 at 6.75% compounding quarterly for 10 years
(c) $10,000 at 6.75% compounding monthly for 10 years
SOLUTION
(a)
F = P (1 + i ) n = 10000(1 + .0675)10 = $19216.70
(b)
i nm 0.0675 (10 )( 4 ) 0.0675 40
F = P (1 + ) = 10000(1 + ) = 10000(1 + ) = $19530.02
m 4 4
(c)
i nm 0.0675 (10 )(12 ) 0.0675 120
F = P (1 + ) = 10000(1 + ) = 10000(1 + ) = $19603.21
m 12 12
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible 21-1
website, in whole or in part.
, Solution and Answer Guide: Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
21.2 Compute the interest earned on the deposits made in Problem 21.1.
SOLUTION
(a) Interest = $19216.70 − $10000 = $9216.70
(b) Interest = $19530.02 − $10000 = $9530.02
(c) Interest = $19603.21 − $10000 = $9603.21
21.3 How much money do you need to deposit in a bank today if you are planning to
have $5000 in four years by the time you get out of college? The bank offers a 6.75%
interest rate that compounds monthly.
SOLUTION
F 5000
P= nm
= ( 4 )(12 )
= $3819.78
i 0.0675
1 + 1 +
m 12
21.4 How much money do you need to deposit in a bank each month if you are planning
to have $5000 in four years by the time you get out of college? The bank offers a
6.75% interest rate that compounds monthly.
SOLUTION
i 0.0675
A=F m = 5000 12 = $91.02
nm ( 4 )(12 )
i 0.0675
1 + − 1 1 + − 1
m 12
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible 21-2
website, in whole or in part.
, Solution and Answer Guide: Moaveni, Engineering Fundamentals: An Introduction to Engineering 7e, SI Edition, 2024,
9780357684429; Chapter 21: Engineering Economics
21.5 Determine the effective rate corresponding to the following nominal rates:
(a) 6.25% compounding monthly
(b) 9.25% compounding monthly
(c) 16.9% compounding monthly
SOLUTION
12
i 0.0625
(a) ieff = (1 + ) m − 1 = 1 + − 1 = 0.0643 or 6.43%
m 12
12
i 0.0925
(b) ieff = (1 + ) m − 1 = 1 + − 1 = 0.0965 or 9.65%
m 12
12
i 0.169
(c) ieff = (1 + ) m − 1 = 1 + − 1 = 0.1827 or 18.27%
m 12
21.6 Using Excel or a spreadsheet of your choice, create interest-time factor tables,
similar to Table 21.9, for i = 6.5% and i = 6.75%.
SOLUTION
The Interest-Time Factors for i = 6.5%
n (F/P, i, n) (P/F, i, n) (P/A, i, n) (A/P, i, n) (F/A, i, n) (A/F, i, n)
1 1.06500000 0.93896714 0.93896714 1.06500000 1.00000000 1.00000000
2 1.13422500 0.88165928 1.82062642 0.54926150 2.06500000 0.48426150
3 1.20794963 0.82784909 2.64847551 0.37757570 3.19922500 0.31257570
4 1.28646635 0.77732309 3.42579860 0.29190274 4.40717462 0.22690274
5 1.37008666 0.72988084 4.15567944 0.24063454 5.69364098 0.17563454
6 1.45914230 0.68533412 4.84101356 0.20656831 7.06372764 0.14156831
7 1.55398655 0.64350621 5.48451977 0.18233137 8.52286994 0.11733137
8 1.65499567 0.60423119 6.08875096 0.16423730 10.07685648 0.09923730
9 1.76257039 0.56735323 6.65610419 0.15023803 11.73185215 0.08523803
© 2024 Cengage. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible 21-3
website, in whole or in part.
