4. A train 270 metres long is moving at a speed of 25 kmph. It will cross a man coming from the opposite direction at a speed of 2 km per hour in:

5. A train 300 m long crossed a platform 900 m long in 1 minute 12 seconds. The speed of the train in km/hr was:

6. The length of the train that takes 8 seconds to pass a pole when it rubs at a speed of 66 km/hr is: