Question - 
            
            
            
            
            Answer - 
            The feasible region determined by the constraints, x +2y ≥100, 2x − y ≤0, 2x + y ≤200, x ≥0, and y ≥0, is given below

A (0, 50), B (20, 40), C (50, 100) and D (0, 200) are the cornerpoints of the feasible region. The values of Z at these corner points are givenbelow
   |    Corner  point    |      Z = x + 2y    |    |  
   |    A (0, 50)    |      100    |      Minimum    |  
   |    B (20, 40)    |      100    |      Minimum    |  
   |    C (50,  100)    |      250    |    |  
   |    D (0, 200)    |      400    |      Maximum    |  
The maximum value of Z is 400 at point (0, 200) and the minimumvalue of Z is 100 at all the points on the line segment joining the points (0,50) and (20, 40)