If the ratio of the area of circle A to the area of circle B is 2 : 1, then how many times larger is the circumference of circle A than the circumference of circle B?
area A / area B = 2 / 1; => radius A / radius B = \(\sqrt{2}\); circumference of circle A / circumfereance of circle B = radius A / radius B = \(\sqrt{2}\) => \(\sqrt{2}\)≈1.41;
