Question

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 mark the option:

A train crosses a pole in 15 seconds. What is the length of the train?
I. The train crosses another train running in opposite direction with a speed of 120 kmph in 33 seconds.
II. The speed of the train is 162 kmph.

• A. if the data in Statement I alone are sufficient to answer the question, while the data in Statement II alone are not sufficient to answer the question.
• B. if the data in Statement II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question.
• C. if the data either in Statement I or in Statement II alone are sufficient to answer the question.
• D. if the data even in both Statements I and II together are not sufficient to answer the question.
• E. if the data in both Statements I and II together are necessary to answer the question.

Answer 1

The correct option is B

if the data in Statement II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question.

Time taken to cross a pole $=\frac{Lengthoftrain}{Speedoftrain}$ $\Rightarrow 15=\frac{Lengthoftrain}{(162\times \frac{5}{18})}$

$\Rightarrow$ Length of the train = 675 m

Clearly, II is sufficient to get the answer.

Also, I is not sufficient to get the answer.