Question 70137
2w+2(2w+2)=340
2w+4w+4=340
6w=340-4
6w=336
w=336/6
w=56 meters for the width. thus
l=2*56+2
l=112+2
l=114 meters for the length
proof
2*56+2*114=340
112+228=340
340=340