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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? 

Sagot :

area A / area B = 2 / 1; => radius A / radius B = [tex] \sqrt{2} [/tex];
circumference of circle A / circumfereance of circle B =  radius A / radius B = [tex] \sqrt{2} [/tex] => [tex] \sqrt{2} [/tex]≈1.41;