Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is: A. 30 km/hr B. 45 km/hr C. 60 km/hr D. 75 km/hr Answer Workspace Report Discuss Answer with explanation Answer: Option C Explanation Let the speed of the slower train be x m/sec. Then, speed of the faster train = 2x m/sec. Relative speed = (x + 2x) m/sec = 3x m/sec. (100 100) 8 = 3x 24x =200 x = 25 3 So, speed of the faster train = 50 3 m/sec = 50 3 x 18 5 km/hr = 60 km/hr. Workspace
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