Discuss Forum
1. If the ratio of the radii of the two circles is 3 : 2, than the ratio of the areas of the two circles is:
- A. 4 : 9
- B. 4 : 9
- C. 4 : 9
- D. 4 : 9
Answer: Option B
Explanation:
area of circle = pi * r2
a1 / a2 = r1 2 / r2 2 = (3) 2 / (2) 2 = 9 / 4
a1 / a2 = r1 2 / r2 2 = (3) 2 / (2) 2 = 9 / 4
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