It takes 10 s and 15 s, respectively, for two trains travelling at different constant speeds to completely pass a telegraph post. The length of the first train is 120 m and that of the second train is

(A) 2.0 (B) 10.0 (C) 12.0 (D) 22.0

Your Answer

wrong question, there is no relation of 2nd train with the 1st train in terms of speed, time and length. so the question can not be solved...

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