Question

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?

Answer 1

area A / area B = 2 / 1; => radius A / radius B =
`√(2)`;
circumference of circle A / circumfereance of circle B = radius A / radius B =
`√(2)` =>
`√(2)`≈1.41;