Question
The speeds of train 'A' and 'B' are 25 m/s and 15 m/s,
respectively. Whereas the lengths of train 'A' and 'B' are in the ratio 3:2, respectively. If the trains take 8 seconds to cross each other while travelling in opposite directions, then find the length of train 'A'.Solution
Let the length of trains 'A' and 'B' be '3x' metres and '2x' metres, respectively. ATQ; {3x + 2x}/{25 + 15} = 8
{5x/40} = 8
5x = 320
or, x = 64 So, length of train 'A' = 3x = 3 × 64 = 192 metres
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