Question 463106
length = l
width = w
{{{l = 2*w}}}
perimeter = 318
{{{2*l + 2*w = 318}}}
divide all by 2:
l + w = 159
2w + w = 159
3w = 159
w = 159/3 
w = 53
l = 2w = 2 * 53 = 106

so, the dimension will be: 106 feet long and 53 feet wide