The perimeter of a rectangular field is 300 meters. This field is to be fenced along three sides only. The fencing along its two lengths and one width is to be done at $50 per meter. If the total cost of fencing is $12,000, what are the field’s dimensions?

Answer 1

2w+2l=300
(w+2l)*50 = 12000

width=60
length=90