Engineering Economic Analysis

130 MORE INTERESTFORMULAS

(Answers: B=$228.13; C=$634;V=$51.05;

x =$66.24)

For diagrams (a)-(d), compute the unknown values

C,A, F, A,respectively.

4-3

75

1

50

2+ t

0-1-2-3-4

t

C

i= 10%

(a)

A A A A A A

t t t t t t

0-1-2-3-4-5-6

t

500

(c)

F

i= 10%

(b)

120

80 t

+0 I I

0-1-2-3-4

i= 10% ~ ~ ~ ~

A A A A

(d)

(Answers:C=$109.45;A =$115;F=$276.37;

A=$60.78)

4-4 For diagrams(a)-(d),compute the unknown values

W,X,Y,Z, respectively.

100

7f i

50

21 t

0-1-2-3-4

1

i= 10%

w

(a)

i'I
'.~
i!
L....__

200

if 1

0-1-2-3-4-5

1

i= 10%

x

(b)

100 100

1 t 1

0-1-2-3

1 i~ 10%

y z

(c) (d)

4-5 Compute the value ofPin the diagram.

250

200

T T 1 I

0-1-2-3

1 i~ 10%

p

(Answer: P=$589.50)

4-6 Use a 10% interest rate to compute the value of X iJ

the diagram.

500

TTiT3r

0-1-2-3-4-5

1

X

4-7 Use a 15% interest rate to compute the value ofPiJ

the diagram.

300

r 5f r r r

0-1-2---=-3-4-5-

1

p

.,

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