In a circle of radius $5$ cm, perpendicular from centre to a chord is $3$ cm. Length of chord is

In a circle of radius $5$ cm, perpendicular from centre to a chord is $3$ cm. Length of chord is
  1. $8$ cm
  2. $4$ cm
  3. $10$ cm
  4. $6$ cm

Solution

Half-chord $= \sqrt{5^2-3^2} = 4$. Chord $= 8$.

Asked in: MH-SSC-9

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