Polynomial Roots and Concentric Circles Area Ratio
XAT 2024 · Quantitative Ability & Data Interpretation · Medium · Algebra
The roots of the polynomial are the radii of three concentric circles.
The ratio of their area, when arranged from the largest to the smallest, is:
- A.
6:2:1
- B.
9:4:1
- C.
16:6:3
- D.
36:16:1
- E.
None of the remaining options is correct.
Answer
D
Explanation
Let's find the roots of . By inspection, . Dividing by gives . . So the three roots (radii) are . The areas of the circles are proportional to . Ratio of areas .
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