Page No 513:
Question 1:
Maximise Z = 3x + 4y
Subject to the constraints:![]()
The feasible region determined by the constraints, x + y ≤ 4, x ≥ 0, y ≥ 0, is as follows.

The corner points of the feasible region are O (0, 0), A (4, 0), and B (0, 4). The values of Z at these points are as follows.
Corner point | Z = 3x + 4y | |
O(0, 0) | 0 | |
A(4, 0) | 12 | |
B(0, 4) | 16 | → Maximum |
Therefore, the maximum value of Z is 16 at the point B (0, 4).