The radius of the small circle A is one-half the radius of the large circle B.WHat is the ratio of the area of the small circle to the area of the large circle?

Answer 1

Why not just pick two values of r
say: r = 3 and r = 6
area of small = 9π
area of larger = 36π

You will find that the ratio of small circle : large circle = 1 : 4 , no matter what numbers you pick

Answer 2

Pick any two number to workout