A car is travelling at an average speed of 80km... - WAEC Mathematics 1991 Question
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
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Correct Option: B
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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