3 Consider the following linear programming problem:
Maximise \(\quad 3 x + 4 y\)
subject to \(\quad 2 x + 5 y \leqslant 60\)
\(x + 2 y \leqslant 25\)
\(x + y \leqslant 18\)
- Graph the inequalities and hence solve the LP.
- The right-hand side of the second inequality is increased from 25 . At what new value will this inequality become redundant?