application of minimum and maximum values. all i need is a clear and detailed solution you can add some notes (will appreciate that). pls do type it if you have a bad handwritten thanku in advance.

3. A thin-walled cone-shaped cup (Fig.3.1) is to hold 361 in of water when full. What dimensions will minimize the amount of material needed for the cup? Ans. 3v2 and 6. S