1. A train running at the speed of 60 km/hr crosses a tree in 9 seconds. What is the length of the train? A. 120 metres B. 180 metres C. 324 metres D. 150 metres 2. A train 125 m long passes a boy, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is: A. 45 km/hr B. 50 km/hr C. 54 km/hr D. 55 km/hr 3. Find the length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds? A. 200 m B. 225 m C. 245 m D. 250 m 4. Two trains running in opposite directions cross a boy standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is: A. 1 : 3 B. 3 : 2 C. 3 : 4 D. None of these 5. A train passes a station platform in 36 seconds and a boy standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, wha...