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# Linear Programming Model Set Objective Function

1. A company produces two products that are processed on two assembly lines. Assembly line 1 has 100 available hours, and assembly line 2 has 42 hours. Each product requires 10 hours of processing time on line 1, while on line 2 product 1 requires 7 hours and product 2 requires 3 hours. The profit for product 1 is \$6 per unit, and the profit for product 2 is \$4 per unit.

a. Formulate a linear programming model for this problem.

2. The Pinewood Furniture Company produces chairs and tables from two resources-labor and wood. The company has 80 hours of labor and 36 pounds of wood available each day. Demand for chairs is limited to 6 per day. Each chair requires 8 hours of labor and 2 pounds of wood to produce, whereas a table requires 10 hours of labour and 6 pounds of wood. The profit derived from each chair is \$400 and from each table, \$100. The company wants to determine the number of chairs and tables to produce each day in order to maximize profit.

a. Formulate a linear programming model for this problem.

3. The Elixer Drug Company produces a drug from two ingredients. Each ingredient contains the same three antibotics in different proportions. One gram of ingredient 1 contributes 3 units, and ingredient 2 contributes 1 unit of antibiotic 1; the drug requires 6 units. At least 4 units of antibiotic 2 are required, and the ingredients each contribute 1 unit per gram. At least 12 units of abtibiotic 3 are required; a gram of ingredient 1 contributes 2 units, and a gram of ingredient 2 contributes 6 units. The cost for a gram of ingredient 1 is \$80, and the cost for a gram of ingredient 2 is \$50. The company wants to formulate a linear programming model to determine the nunber of grams of each ingredient that must go into the drug in order to meet the antibiotic requirements at the minimum cost.

a. Formulate a linear programming model for this problem.

4. A clothier makes coats and slacks. The two resources required are wool cloth and labor. The clothier has 150 square yards of wool and 200 hours of labor available. Each coat requires 3 square yards of wool and 10 hours of labor, whereas each pair of slacks requires 5 square yards of wool and 4 hours of labor. The profit for a coat is \$50, and the profit for slacks is \$40. The clothier wants to determine the number of coats and pairs of slacks to make so that profit will be maximized.

a. Formulate a linear programming model for this problem.

#### Solution Preview

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1. A company produces two products that are processed on two assembly lines. Assembly line 1 has 100 available hours, and assembly line 2 has 42 hours. Each product requires 10 hours of processing time on line 1, while on line 2 product 1 requires 7 hours and product 2 requires 3 hours. The profit for product 1 is \$6 per unit, and the profit for product 2 is \$4 per unit.

a. Formulate a linear programming model for this problem.
Let
X1= units of product 1 produced
X2= units of product 2 produced

Objective Function

Maximize 6X1+4X2

Subject to
10x1+10x2 <=100 Availability of assembly line 1
7x1+3x2 <=42 Availability of assembly line 2
X1, X2 >=0

2. The Pinewood Furniture Company produces chairs and tables from two ...

#### Solution Summary

This post answers four problems on linear programming model. The students can learn how to set the objective functions and constraints for the linear programs by going through this post.

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