The ratio of the diameters of two circles is 3:5. The circumference of the larger circle is approximately 113.1 m. What is the approximate circumference of the smaller circle?

Circumference is directly proportional to diameter, so the circles’ circumferences have the same ratio, 3:5. The smaller circumference is (3/5) × 113.1 m = 67.86 m, which is approximately 67.9 m. Therefore, the correct choice is 67.9 m.

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