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A car is travelling at an average speed of 80km/hr. Its speed in meters per...

Mathematics
WAEC 1991
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
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Correct Answer: Option B
Explanation
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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