68. Consider the following LPP :
Max Z=15x1+10x2
Subject to the constraints
4x1+6x2 ≤ 360
3x1+0x2 ≤ 180
0x1+5x2 ≤ 200
x1 , x2> / 0
The solution of the LPP using Graphical solution technique is :
(1) x1=60, x2=0 and Z=900
(2) x1=60, x2=20 and Z=1100
(3) x1=60, x2=30 and Z=1200
(4) x1=50, x2=40 and Z=1150