Exercise :: Problems on Trains  Data Sufficiency 1
 Problems on Trains  Important Formulas
 Problems on Trains  General Questions
 Problems on Trains  Data Sufficiency 1
 Problems on Trains  Data Sufficiency 2
 Problems on Trains  Data Sufficiency 3
Each of the questions given below consists of a statement and / or a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement(s) is / are sufficient to answer the given question. Read the both statements and
 Give answer (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.
 Give answer (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.
 Give answer (C) if the data either in Statement I or in Statement II alone are sufficient to answer the question.
 Give answer (D) if the data even in both Statements I and II together are not sufficient to answer the question.
 Give answer(E) if the data in both Statements I and II together are necessary to answer the question.
1. 


Answer: Option E Explanation:
u + v = 51.
Thus, u and v can be obtained. Correct answer is (E). 
2. 


Answer: Option E Explanation: Let the two trains of length a metres and b metres be moving in opposite directions at u m/s and v m/s.
a = (375  180) = 195 m. 
3. 


Answer: Option E Explanation:
Thus, l can be obtained. So both I and II are necessary to get the answer. The correct answer is (E). 