Quantity A: The area of a circle with a circumference of 10π. Quantity B: The area of an equilateral triangle with a side length of 6.

✓ Correct Answer: Option A

Quantity A: C=2πr=10π => r=5. Area=πr^2=25π ≈ 78.5. Quantity B: Area of equilateral triangle = (√3/4) * side^2 = (√3/4) * 6^2 = 9√3 ≈ 15.6. Quantity A is greater.