Question
A train of length 400 metres crosses a man standing on
platform in 16 seconds. If its speed decreases by 20%, then find the time taken by train to cross a platform of length 560 metres.Solution
Speed of train = (400 ÷ 16) = 25 m/s New speed of train = 0.8 × 25 = 20 m/s Required time = (400 + 560) ÷ 20
= 960 ÷ 20
= 48 seconds
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