Question
A 140-metre train takes 7 seconds to cross a pole. If
the same train takes 10 seconds to cross train 'E' that is travelling in opposite direction at 22 m/s on a parallel track, then find the length of train 'E'.Solution
ATQ, Speed of train 'A' = (140 ÷ 7) = 20 m/s Let the length of train 'E' be 'x' metres. ATQ; (140 + x) ÷ (20 + 22) = 10 Or, 140 + x = 420 So, 'x' = 420 - 140 = 280 Therefore, length of train 'E' = 280 metres
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