Question
A 600-metre-long train takes 24 seconds to cross a pole.
Due to a technical issue, its speed is reduced by 20%. Find the time taken by the train to cross a platform of length 900 metres.Solution
Speed of the train = 600 / 24 = 25 m/s
New speed = 0.8 × 25 = 20 m/s
Required time = (600 + 900) ÷ 20 = 1500 ÷ 20 = 75 seconds
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