WAEC - Mathematics (1991 - No. 16)
A car is travelling at an average speed of 80km/hr. Its speed in meters per second (m/s) is
13.3m/s
22.2m/s
133.3m/s
222.2m/s
1333.3m/s
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
= \(\frac{200m/s}{9}\) = 22.22m/s
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