A car is travelling at an average speed of 80km/hr. Its speed in meters per second (m/s) is

  • A 13.3m/s
  • B 22.2m/s
  • C 133.3m/s
  • D 222.2m/s
  • E 1333.3m/s
waec 1991mathematics

The correct answer is B. 22.2m/s

80km/h = \(\frac{80}{60}\) x \(\frac{1000}{60}\) = 3 x 3= \(\frac{40 x 5}{9}\)

= \(\frac{200m/s}{9}\) = 22.22m/s

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