You are Commissioned to design a large capacity storage tank for a fluid liquid, which is known to be highly corrosive; The tank capacity must be 3x106 liters (106x105ft3), and we will use the density of water as a design reference. The welding efficiency will be 90%. The estimated costs are as follows:

C1= 150$/m² (50$/ft² )

C2= 30$/m² (10$/ft² )

C3= 75$/m² (25$/ft² )

C4= 15$/m² ( 5$/ft² )

C5= 15$/m² ( 5$/ft² )

For the design you can use the metric system you want (international or imperial).