A car moves at an average speed of 30kmh\(^{-1}\), how long does it take to cover 200 meters?
- 2.4 sec
-
24 sec
- 144 sec
- 240 sec
The correct answer is: B
Explanation
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