matlab codes

Problem (2): A fenced enclosure consists of a rectangle of length L and width 2R and a semicircle of radius R as shown below. The enclosure is to be built to have an area A of 2000 ft? The cost of the fence is S50 per foot for the curved portion and $40 per foot for the straight sides. Use the fminbnd function to determine the values of Rand L required minimizing the total cost of the fence. Also compute the minimum cost. 2R