A chord of a circle of a diameter 42cm subtends an angle of 60° at the centre of the circle. Find the length of the mirror arc

  • A 22cm
  • B 44cm
  • C 110cm
  • D 220cm
jamb 1997mathematics

The correct answer is A. 22cm

Diameter = 42cm

Length of the arc = \(\frac{\theta}{360°} \times \pi d\)

= \(\frac{60}{360} \times \frac{22}{7} \times 42cm\)

= \(22cm\)

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