Formulate this scenario as a linear programming problem, making sure you clearly and fully define your decision variables, constraints, and objective function.
Formulate this scenario as a linear programming problem, making sure you clearly and fully define your decision variables, constraints, and objective function.
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Transcribed Image Text:A farm occupies 200 acres of land and has £10000 available for investment. The family who
run the farm can work for a total of 5000 work-hours during the winter and 7000 work-hours
for the rest of the year. If any of these work-hours are not needed then the family will use
them to help at the local village store, earning a profit of £9 per hour (regardless of the time
of year). Past experience shows the family will not have more than 50 spare work-hours to
work in the village store during the winter and not more than 80 over the summer.
The farm brings in cash for the family from three crops (lettuces, carrots, and swedes) and
two types of livestock (dairy cows and hens). The family would like to maximise their cash
income. The crops need no investment funds but each cow requires an initial investment of
£1000 and each hen £10. Each cow needs 1.5 acres of land and the size of the barn limits the
number of cows in the herd to 20. Each cow also require 100 work hours during the winter
and 60 hours during the rest of the year. The hens do not need any specific land, but the farm
can accommodate a maximum of 100 hens. To look after them well, each hen needs 1.1
work hours during the winter and 0.8 work hours during the rest of the year. A cow brings
in a net annual income of £400 while a hen generates £3.
Crops also generate income and require work hours to tend to them. The table below sum-
marises such information:
crop winter work hours summer work hours
Lettuce
Carrots
Swede
20
25
10
10
40
10
income (per acre)
£100
£130
£110
Formulate this scenario as a linear programming problem, making sure you clearly and fully
define your decision variables, constraints, and objective function.
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