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(a)Maximise z = 4x + y subject to cons...

(a)Maximise z = 4x + y
subject to constraints :
x + y `le` 50
3x + y `le ` 90
x `ge ` 0
y `ge` 0
by graphical method.
(b) Find the value of K, if f(x) = `{{:(Kx + 1, "if"x le pi),(cos x, "if " x gt pi):}` is continuous at x = `pi`.

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The correct Answer is:
Maximum of Z = 120 at (30, 0)
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