Q. 28. Solve the following linear programming problem:
Maximise : = 150x + 250 y
Subject to: 4x + y = 40
3x + 2y =60
x=0
y=0
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Maximum value is 7500
Given:
Maximise : = 150x + 250 y
Subject to: 4x + y = 40
3x + 2y =60
x=0
y=0
Find:
Maximum value of graph.
Explanation:
- First equation constrain are given by.
- 4x + y = 40
- Put y = 0 and find value of x.
- 4x + 0 = 40
- x= =10 first point (10,0)
- Put x = 0 and find value of y.
- y = 40 second point (0,40)
- Similarly for second equation put value of x and y = 0.
- Therefore 3x + 2y =60
- 3x = 60 → x =20 point = (20,0)
- Similarly, 2y =60 → y= 30 point (0,30)
- Constrain of the equation 4x + y = 40 is (10,0) and (0,40)
- Similarly, for equation 3x + 2y =60 is (20,0) and (0,30)
- x is grater than 0 and y is grater than 0
- Draw the graph of above constrains.
- From graph the bonded region for this contain is (0,30) (4,24) and (10,0)
- From this we can check maximum value for each point.
- For (0,30) Z= 150 x + 250 y = 150×0 + 250×30 = 7,500
- For (4,24) Z = 150×4 + 250×24 = 6,600
- For (10,0) Z = 150×10 + 250×0 = 1500
- Out of the above equation maximum value is 7,500.
Hence maximum value is 7500.
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