The given question consists of a set of statements. Find out whether the data provided in the statements are sufficient to answer the question and then mark the appropriate option.
How much time will the train X take to cross another train Y running in opposite direction?
I. Train X crosses a lamp post in 9 seconds.
II. Ratio of the speeds of trains X and Y is 3:2.
III. Length of the two trains together is 750 metres.
Cannot be determined
II. Let the speeds of A and B be `3x' m / sec and `2x' m / sec.
I. Length of train X = (3x × 9) m = 27x metres.
III. Length of train Y = (750 - 27x) m.
Relative speed = (3x + 2x) m/sec = 5x m/sec.
Time taken by X to cross Y=Sum of their lengthsRelativespeed=7505xsec.
Thus, even with the information in all the three statements, question remains unanswered.