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Answer :

Answer:

I think it would be 450 mm.

I believe 2 (226.1 mm) is the correct answer.
Step 1.

Find the circumference of the circle.
6(2)•3.14
37.68

Step 2. Multiply the circumference with the height (12mm)
37.68•12=452.16.

Final step: Divide your final answer by 2 because this object shown above is a cone.
452.16/2=226.08