A waste-holding lagoon situated near the main plant of a chemical company receives sludge on a daily basis. When the lagoon is full, it is necessary to remove the sludge to a site located 4.95 kilome- ters from the main plant. Currently, when the la- goon is full, the sludge is removed by pumping it into a tank truck and hauling it away. This process requires the use of a portable pump that has an initial cost of $800 and an 8-year life. The com- pany can operate the pump at a cost of $25 per day, but the truck and driver cost $110 per day.
A waste-holding lagoon situated near the main plant of a chemical company receives sludge on a daily basis. When the lagoon is full, it is necessary to remove the sludge to a site located 4.95 kilome- ters from the main plant. Currently, when the la- goon is full, the sludge is removed by pumping it into a tank truck and hauling it away. This process requires the use of a portable pump that has an initial cost of $800 and an 8-year life. The com- pany can operate the pump at a cost of $25 per day, but the truck and driver cost $110 per day.
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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Transcribed Image Text:8.18 A waste-holding lagoon situated near the main
plant of a chemical company receives sludge on a
daily basis. When the lagoon is full, it is necessary
$3:
Sa
M.
to remove the sludge to a site located 4.95 kilome-
ters from the main plant. Currently, when the la-
goon is full, the sludge is removed by pumping it
into a tank truck and hauling it away. This process
ava
tity
ex
8.21 A
1 Scie
requires the use of a portable pump that has an
initial cost of $800 and an 8-year life. The com-
roa
tiv
pany can operate the pump at a cost of $25 per day,
but the truck and driver cost $110 per day.
ini
an
Alternatively, the company has a proposal to
install a pump and pipeline to the remote site. The
pump would have an initial cost of $600, a life of
Al
cos
coa
10
years, and a cost of $3 per day to operate. (a) If
the MARR is 15% per year and the pipeline will
cos
mi
cost $3.52 per meter to construct, how many days
(a)
the
per year must the lagoon require pumping to jus-
tify construction of the pipeline? (b) The lagoon
was pumped 40 times last year. Which alternative
would have been cheaper? How do you know this
is the correct answer?
bre
of
cal
8.22 Thr
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