22. A train 300 metres long passes a standing man in 15 seconds. The speed of the train is:

23. A person sees a train passing over 1 km long bridge. The length of the train is half that of bridge. If the train clears the bridge in 2 minutes the speed of the train is:

24. A train 280 metres long is moving at speed of 60 kim/hr. The time taken by the train to cross a platform 220 metres long is: