Question
A train 180 meters long is moving at a speed of 72 km/h.
How long will it take to cross a platform 120 meters long?Solution
Speed of the train = 72 km/h = (72 × 1000) / 3600 = 20 m/s. The total distance to be covered = Length of the train + Length of the platform = 180 + 120 = 300 meters. Time = Distance / Speed = 300 / 20 = 15 seconds. Thus, the train will take 15 seconds to cross the platform. Correct option: d
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