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Circles, SM-Bank 041

Use the arc length formula below to calculate the arc length of the sector, correct to the nearest whole number.  (2 marks)

\(l=\dfrac{\theta}{360}\times 2\pi r\)

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\(628\ \text{km  (nearest whole number)}\)

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\(l\) \(=\dfrac{\theta}{360}\times 2\pi r\)
  \(=\dfrac{120}{360}\times 2\pi \times 300\)
  \(=628.3185\dots\)
  \(=628\ \text{km  (nearest whole number)}\)