Question: For the can problem in Example 4, the minimum surface area required that the height be twice the radius. Show that this is true for

For the can problem in Example 4, the minimum surface area required that the height be twice the radius. Show that this is true for a can of arbitrary volume V.
Example 4

A coffee company wants to manufacture cylindrical aluminum coffee cans with a volume of 1000 cm³ (1 liter). What should the radius and height of the can be to minimize the amount of aluminum used?

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