A 5,000 m² rectangular area of a field is to be enclosed by a fence, with a movable inner fence built across the narrow part of the field.The perimeter fence costs
$10/m and the inner fence costs
$4/m. Determine the dimensions of the field to minimize the cost to construct the fencing.
Is t his How I solve?: A=5000 5000=x*w Costs are x=10*2i y=10*2i + 4i =20i =24i 5000=20i*24i
Am I on the right track?