A car moves at an average speed of 30kmh -1 how... - WAEC Mathematics 2000 Question
A car moves at an average speed of 30kmh\(^{-1}\), how long does it take to cover 200 meters?
A
2.4 sec
B
24 sec
C
144 sec
D
240 sec
correct option: b
Speed = 30 kmh\(^{-1}\)
= \(\frac{30 \times 1000}{3600}\)
= \(\frac{25}{3} ms^{-1}\)
Time = \(\frac{Distance}{Speed}\)
= \(\frac{200}{\frac{25}{3}}\)
= \(\frac{200 \times 3}{25}\)
= 24 seconds
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