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

Length of train is not mentioned in question. How you calculated. Please describe me.

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