Engineering Economic Analysis

Problems

6-52 A $78,000 mortgage has a 30-year term and a 9%

-.nominal intere.strate.(a)What is the monthly payment?

(b)After the first year of payments, what is the out-

standing balance?

(c) How much interest is paid in month 13? How

much principal?

6-53 A $92,000 mortgage has a 30-year term and a 9%

JI. nominal interest rate.(a)What is the monthly payment?

(b)After the first year of payments, what fraction of

the loan has been repaid?

(c) After the first 10 years of payments, what is the

outstandingbalance?.

(d) How much interest is paid in Month 25? How

much principal?

1 A 30-year mortgage for $95,000 is issued at a 9%

JII.. nominal interest rate.(a)What is the monthly payment?

(b)How long does it take to pay off the mortgage, if

$1000 per month is paid?

(c) How long does it take to payoff the mortgage, if

double payments are made?

6-55 A 30-year mortgage for $145,000 is issued at a 6%

_. .. nominal interest rate.(a)What is the monthly payment?

(b)How long does it take to payoff the mortgage, if

$1000 per month is paid?

(c) How long does it take to payoff the mortgage, if

20% extra is paid each month?

6-56 Solve Problem 6-32 for the breakeven first cost per

&:IiiiIiiii8. kilometer of going under the lake.

6-57 Redo Problem 6-38 to calculate the EUAW of the

all. alternativesas a function of miles driven per year tosee if there is a crossover point in the decision process.

Graph your results.

6-58 Set up Problem 6-18 on a spreadsheet to make all the

A input data variable and detennine various scenarioswhich would make the bailer economical.

6-59 Develop a spreadsheet to solve Problem 6-44. What

.is the breakeven cost of the additional plimpinginvestment in year10?

=

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