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'Cola Can' printed from

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An aluminium can contains
330 ml of cola.

If the can's diameter is 6 cm what is the can's height?

If instead the can's height was 10 cm what would the can's diameter have to be?

Which of these two cans uses the least aluminium?

If you could choose any diameter which dimensions for the can would use the least amount of aluminium to package 330 ml of cola?