The Sureset Concrete Company produces concrete. Two ingredients in concrete are sand (costs $6 per ton) and gravel (costs $8 per ton). Sand and gravel together must make up exactly 75% of the weight of the concrete. Also, no more than 40% of the concrete can be sand and at least 30% of the concrete can be gravel. Every day 2000 tons of concrete are produced. To minimize costs, how many tons of gravel and sand must be purchased each day?

Linear Programming Model
Objective Function (Max or Min):
subject to
LEFT SYMBOL (0.40 * 2000)
LEFT SYMBOL (0.30 * 2000)
LEFT SYMBOL 0.75 * 2000
X; Y > 0


Optimal solution:
X =
Y =
Cost = $

Answer rating: 100% (QA)

To minimize costs lets set up the linear programming model Objective Function Min... View the full answer