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Average Speed

a train of le...

Question

a train of length100 m travelling at 50 m/s overtakes another train of length 200 m moving at 30 m/s. how much time is taken by the first train to overtake the second train ?

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Solution

$R e l a t i v e s p e e d = 50 - 30 = 20 m / s e c T o t a l d i s \tan c e c o v e r e d = 100 + 200 = 300 m e t T i m e = \frac{300}{20} = 15 s e c$

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