A train 108 m long is moving at a speed of 50 km/hr . It crosses a train 112 m long coming from opposite direction in 6 seconds. What is the speed of the second train?

82

76

58

44

Total distance = 108+112 = 220 m Time = 6s Relative speed = distance/time = 220/6 m/s = 110/3 m/s = (110/3) × (18/5) km/hr = 132 km/hr => 50 + speed of second train = 132 km/hr => Speed of second train = 132-50 = 82 km/hr

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