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The circumference of a circle is calculated using the formula ( C = 2\pi r ), where ( r ) is the radius. If 7.8 meters refers to the diameter, the circumference would be ( C = \pi \times 7.8 ) meters, which is approximately 24.5 meters. If 7.8 meters is the radius, then the circumference would be ( C = 2\pi \times 7.8 ) meters, approximately 49.0 meters.

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1w ago

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