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Cola Can

Age 11 to 14 Challenge Level:

An cylindrical aluminium can contains
330 ml of cola.

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

If 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 a 330ml can would use the least amount of aluminium?