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+2 votes
18.9k views
in Mathematics by (6.2k points)

Solve the following linear programming problem graphically : Minimize  z = 3x+9y When : x+3y   60, x + y ≥ 10,x ≤ y,   0,   0  

1 Answer

+2 votes
by (12.0k points)
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Best answer

Correct graph of three lines

Correct shading

Vertices of feasible region are

A(0,20), B(15, 15), C(5,5),(0, 10)

Z(A) = 180

Z(B) = 180

Z(C) = 60

Z(D) = 90

:. Z = 60 is minimum at x = 5, y = 5

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