Two trains running in the opposite direction cross each other in 18 sec What is the difference betwe...........

Quantitative Aptitude (SBI-CL) Data Sufficiency

Two trains, running in the opposite direction cross each other in 18 sec. What is the difference between their lengths?

Statement I: The difference between their speeds is 12 m/sec

Statement II: The sum of their speeds is 36 meters per second.

The data in statements I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question.

The data in statements II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question.

Either Statement I or Statement II alone is sufficient to answer the question.

The data in both the statements I and II is not sufficient to answer the question.

The data in both the statements I and II together is necessary to answer the question.

Explanation:

If we combine both the statement, then we can conclude their speed as 24 m/sec and 12 m/sec
Now we can conclude the sum of their length but the difference of their lengths is not possible to get.
Therefore, the data in both the statements I and II is not sufficient to answer the question.
Hence, option D is correct.