Question
A 250-meter-long train crosses a 150-meter-long train
coming from the opposite direction in 20 seconds. If the speed of the first train is 45 km/h, then find the speed of the second train.Solution
When two trains moving in opposite directions cross each other, the sum of their lengths is their total distance. The length of the first train = 250 meters and length of the second train = 150 meter Total distance = 250+150 = 400 meter Time = 20second Then Total speed in km/h = 400/20 × 18/5 = 72 km/h Speed of First train = 45 km/h Speed of second train = 72-45 = 27 km/h
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