Given problem is linear programming , and no method precribe to solve hence solving problem by Graphical method
Max Z =$0.30 x +$0.90y
Subject to Contraints
Subject to:
2x + 3.2y <= 160
4x + 2.0y <= 240
y <= 40
Solving above contraint equation by Graphical method
2x +3.2 y =160
Taking X =0 , hence y =160/3.2=50
Putting y =0 , x = 160/2=80
(x,y ) = (0,50)(80,0)...(.1 )
Now 4x +2y =240
Putting x =0 , y =240/2 =120
Putting y = 0 , X =240/4=60
(X,y ) =(0,120) , (60,0)....(2)
And Y = 40........(3)
Plotting above equation
See image attached
a) Maximum quantity of X =16 and y =40
b)Maximum value of Z =$40.8
Or We can directly find value as follow
as Given y should be less than or equal to 40
and as zmax for y is highest hence 40 unit max unit that can be taken for y .
hence puting value of Y in equation 2X +3.2 y =160. We will get x =16
and if we take contraint 2 we will get X = 40 and y =40. Contraint 1 will not satisfy.
Hence maximum quantity of X =16. And Y=40
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