Chord subtending $60^{\circ}$ at centre in circle of radius $r$ has length

Chord subtending $60^{\circ}$ at centre in circle of radius $r$ has length
  1. $r$
  2. $r\sqrt{2}$
  3. $2r$
  4. $r/2$

Solution

Equilateral triangle with two sides $= r$ has third side $r$.

Asked in: MH-SSC-9

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