ABC26GN4672 · Area

Subject: General Aptitude · Chapter: Area · Exam: · Marks: · Difficulty:

The difference between the areas of the circumcircle and the incircle of a regular polygon of n sides with each side of length 2a, is

(a)$\pi a^{2}$

(b)$(2n+1)\pi a^{2}$

(c)$\pi n a^{2}$

(d)$2\pi n a^{2}$

Answer

Answer (as printed): A

Explanation

Required difference $=\frac{\pi \times(2 a)^{2}}{4}=\frac{4 \pi a^{2}}{4}=\pi a^{2}$.

Explanation as extracted from the printed page; notation may be imperfect.