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Example 3 - Minimise and Maximise Z = 3x + 9y, x + 3y <= 60, x + y >=

Example 3 - Chapter 12 Class 12 Linear Programming - Part 2
Example 3 - Chapter 12 Class 12 Linear Programming - Part 3

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Example 3 Solve the following problem graphically: Minimise and Maximise Z = 3x + 9y subject to the constraints: x + 3y ≤ 60 x + y ≥ 10 x ≤ y x ≥ 0, y ≥ 0 Maximize Z = 3x + 9y Minimize Z = 3x + 9y Subject to, x + 3y ≤ 60 x + y ≥ 10 x ≤ y x ≥ 0, y ≥ 0 ∴ Z = 60 is minimum at (5, 5) Also, Z is maximum at two points (15, 15) & (0, 20) ∴ Z = 180 is maximum at all points joining (15, 15) & (0, 20)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.