A 300 m long train is moving at a speed of 60 km/h. In what time will it cross a single pole?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 18 sec
To pass a pole, a train covers its own length, because the pole has no length of its own.
Speed in metres per second (1 km/h is 5/18 m/s): \(60\times\displaystyle\frac{5}{18}=\frac{50}{3}\) m/s
Time to cover its own 300 m: \(\displaystyle\frac{300}{50/3}=\frac{300\times3}{50}=18\) s