If the area of an equilateral triangle is 108√3 cm2, then find the length of radius of circumcircle of that triangle.

  1. 12 cm
  2. 15 cm
  3. 6 cm
  4. 9 cm

Answer (Detailed Solution Below)

Option 1 : 12 cm
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PYST 1: SSC CGL - General Awareness (Held On : 20 April 2022 Shift 2)
25 Qs. 50 Marks 10 Mins

Detailed Solution

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GIVEN:

Area of an equilateral triangle = 108√3 cm2

CONCEPT:

Mensuration

FORMULA USED:

Area of an equilateral triangle = 

CALCULATION:

Let side of triangle = a

Area of triangle:

⇒ a = 12√3

Length of circumradius of an equilateral triangle = a/√3

= 12√3/√3

= 12 cm

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