Problem:
Muir Manufacturing produces two popular grades of commercial carpeting among its many other products. In the coming production period, Muir needs to decide how many rolls of each grade should be produced in order to maximize profit. Each roll of Grade X carpet uses 50 units of synthetic fiber requires 25 hours of production time, and needs 20 units of foam backing. Each roll of Grade Y carpet uses 40 units of synthetic fiber, requires 28 hours of production time, and needs 15 units of foam backing. The profit per roll of Grade X carpet is $160 and the profit per roll of Grade Y carpet is $200. In the coming production period, Muir has 3000 units of synthetic fiber available for use. Workers have been scheduled to provide at most 1800 hours of production time.
Q1. Which of the following constraints sets the limit on the amount of production time available?
a. 25X + 28Y >= 1800
b. 25X + 28Y<=1800
c. 20X + 15Y >= 1500
d. 20X + 15Y <=1500
Q2. The company has 1500 units of foam backing available for use. Develop a linear programming model for this problem. What is the objective function of this linear problem?
a. MIN 160X + 200Y
b. MAX 200X + 160Y
c. MAX 160X + 200Y
d. MAX 50X + 40Y