Problems on Trains - General Questions Problems on Trains - General Questions Exercise :l 1. A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train? A.120 metres B.180 metres C.324 metres D.150 metres Answer: Option D Explanation: Speed=60 x5m/sec=50m/sec. 183 Length of the train = (Speed x Time). Length of the train =50x 9m = 150 m. 3 2. A train 125 m long passes a man, 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 Answer: Option B Explanation: Speed of the train relative to man =125m/sec 10 =25m/sec. 2 =25x18km/hr 25 = 45 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr. x - 5 = 45 x = 50 km/hr. 3. The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is: A.200 m B.225 m C.245 m D.250 m Answer: Option C Explanation: Speed =45 x5m/sec=25m/sec. 182 Time = 30 sec. Let the length of bridge be x metres. Then,130 + x=25 302 2(130 + x) = 750 x = 245 m. 4. Two trains running in opposite directions cross a man 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 Answer: Option B Explanation: Let the speeds of the two trains be x m/sec and y m/sec respectively. Then, length of the first train = 27x metres, and length of the second train = 17y metres. 27x + 17y= 23 x+ y 27x + 17y = 23x + 23y 4x = 6y x=3. y2 5. A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform? A.120 m B.240 m C.300 m D.None of these Answer: Option B Explanation: Speed =54 x5m/sec = 15 m/sec. 18 Length of the train = (15 x 20)m = 300 m. Let the length of the platform be x metres. Then,x + 300= 15 36 x + 300 = 540 x = 240 m. Problems on Trains - General Questions Problems on Trains - General Questions Exercise :l 1. A train running at the speed of 60 km/hr crosses a pole in 9 second... Read more » 11:26 AM