Question
A train running at 90 km/h crosses an electric pole in
18 seconds and a platform in 65 seconds. What is the length of the platform?Solution
Let the length of the platform be P meters. 90 km/h = 90 ÷ 18/5 = 25 m/sec Hence, the length of the train = 25 × 18 = 450 meters. According to the question, 25 × 65 = (450 + P) ⇒ 1625 = 450 + P  ⇒ P= 1175 The length of the platform is 1175 m.
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