There are two circles with different radii. The radius of the smaller circle is 3 7 \frac{3}{7} 7 3 of the radius of the larger circle. A square has...
Question
There are two circles with different radii. The radius of the smaller circle is of the radius of the larger circle. A square has an area of , and its side length is three times the radius of the larger circle. What is the approximate circumference of the smaller circle?