The ratio of circumradius and In radius of an equilateral triangle is

Options

A. 1:2
B. 3:1
C. 2:1
D. 1:3

Answer

C

Explanation

समबाहु त्रिभुज की परित्रिज्या `(R) = ((a)/(sqrt(3)))`
तथा अंतः त्रिज्या `(r) = ((a)/(2 sqrt(3)))`
` therefore R :r = (a)/( sqrt(3)) : (a)/( 2 sqrt(3)) = 2: 1`