Exercise :: Time and Distance  Data Sufficiency 1
 Time and Distance  Important Formulas
 Time and Distance  General Questions
 Time and Distance  Data Sufficiency 1
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 D Explanation: Let the distance between the two stations be x km. I. Then, speed of the mail train = (y + 12) km/hr.
Thus, even I and II together do not give x. Correct answer is (D). 
2. 


Answer: Option C Explanation:
.__________.______________________________________. A x C (100  x) B Let AC = x km. Then, CB = (100 x) km. I. AB = 125% of CB
x = 20 km. AC = 20 km. Thus, I alone gives the answer.
5x = 100 x = 20. AC = 20 km. Thus, II alone gives the answer. Correct answer is (C). 
3. 


Answer: Option A Explanation: I gives, relative speed = 135 km/hr.
II does not give the relative speed. I alone gives the answer and II is irrelevant. Correct answer is (A). 
4. 


Answer: Option E Explanation: Since ratio of speed of X : Y is 3 : 4, then ratio of time will be 4 : 3. I. If Y takes 3 min, then X takes 4 min.
Thus, I and II together give the answer. Correct answer is (E). 