By Mansi Yadav

Verified by Ajay Kumar

The area of a regular hexagon inscribed in a circle is 200√3 cm². Find the radius of the circle.

  1. 10

  2. 11.54

  3. 14

  4. 16

Answer: B

Solution

Solution: For a regular hexagon inscribed in a circle, the side of the hexagon equals the radius r. Its area is \(\frac{3\sqrt{3}}{2}r^2\). Therefore, \(\frac{3\sqrt{3}}{2}r^2=200\sqrt{3}\Rightarrow r^2=\frac{400}{3}\Rightarrow r=\frac{20}{\sqrt{3}}\approx11.55\) cm. The source green-marks option B, 11.54. Note: The calculation rounds to about 11.55 cm, so the printed option's decimal appears slightly inconsistent.

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