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:

What is the speed of the running goods train?
I. Length of the goods train is 90 metres.
II. The goods train crossed another stationary train whose length is 135 m in 3 seconds.

• 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 E

if the data in both Statements I and II together are necessary to answer the question.

Speed of the first train $=\frac{\left(sumofthelengthofthetwotrains\right)}{Timetaken}$ $=\frac{\left(90+135\right)}{3}m/s=75m/s$

So, both the statements are necessary to get the answer.