optimaziton

Q3: formulate a suitable objective function for the capital costs of a cylindrical pressure vessel and find the optimum (L/D) that minimize the cost. The simplified geometry for the tank is based on the following assumptions: 1. Both ends are closed and flat. 2- The vessel walls (sides & ends) are of constant thickness (t) with material density (p) and the wall thickness is not function of pressure. 3. The cost of fabrication and material is the same for both sides & ends in $/unit wt. 4. There is no wasted material