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Railways PYQCBT 1 2016

RRB NTPC · Question 84

If the area of an equilateral triangle is 44√3 sq. units, calculate the ratio of the radii of its incircle and the radii of its circumcircle. A. 1/ 2 B. 1/ 4 C. 1/ 3 D. 2/ 3

  1. B

  2. A

  3. C

  4. D

Show answer & explanation

Answer: (B) A

Explanation

For an equilateral triangle with side a, the inradius is a/(2√3) and the circumradius is a/√3. Their ratio is always 1 : 2, whatever the area.