Question discussion

A train passes two bridges of length 900 m and 420 m in 75 seconds and 50 seconds, respectively. The length (in m) of the train is:

3616Medium DSSSB TGT Computer Science 0 replies 2 views

Correct answer: A

Explanation

(900 + L)/75 = (420 + L)/50 gives 50(900 + L) = 75(420 + L), i.e. 45000 + 50L = 31500 + 75L. So 25L = 13500 and L = 540 m.

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