设每日生产楼面料x箱，楼顶料y平方米，墙砖面z块，利润为A则30x+20y+50z<=1500 3x+0*y+5z<=200 0.02x+0.1y+0.2z<=3 0.01x+0.05y+0.05z<=1 A=0.8x+5y+5.5z作图就可得解
