SSC CGL 16 Aug 2017 Shift 1 Paper

Question : 65 of 100

Marks: +1, -0

The inradius of a equilateral triangle is 10 cm. What is the circumradius (in cm) of the same triangle ?

Solution:

According to the question.
The inradius of equilateral triangle =

a/{2√3}

⇒

10=a/{2√3}

∴

a=20 √{3} {\cm}

∴ The circumradius of equilateraltriangle

= {a}/{√{3}}= {20 √{3}}/{\√{3}}=20 {\cm}

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