A and B are two circles. The radius of A is thrice as large as the radius of B. What is the ratio between the areas of the circles?  Pick one:
A) 1:8.	B) 1:2.	C) 1:4.	D) 1:9	E) 1:6.
Given : The radius of A is thrice as large as the radius of B. =&gt; R(a) = 3*R(b). The radius are in ratio of 1:3 thus the area will be in the ratio of square of radius. 1:9. Hence 1:9.
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A and B are two circles. The radius of A is thrice as large as the radius of B. What is the ratio between the areas of the circles?