A and B are two circles. The radius of A is twice as large as the diameter of B. What is the ratio between the areas of the circles?  Choose the correct choice from the following
A) 1:8.
B) 1:2.
C) 1:4.
D) 1:16
E) 1:6.
Given :   The radius of A is twice as large as the diameter of B. =&gt; R(a) = 2*D(b) = 2*2*R(b) = 4R(b).   The radius are in ratio of 1:4 thus the area will be in the ratio of square of radius. 1:16.   Hence 1:16.
<result>D</result>
A and B are two circles. The radius of A is twice as large as the diameter of B. What is the ratio between the areas of the circles?