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What is the speed of the stream ? I. The ratio of the speed upstream to the speed downstream of a boat is 2 : 3. II. The distance travelled upstream in 2 hours by the boat is more than the distance travelled by it downstream in 1 hour by 4 km. |
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Answer: Option E Explanation: I. Let speed upstream = 2X km/hr and speed downstream = 3X km/hr. II. (2X x 3X) - (1 x 2X) = 4 <=> 4X = 4 <=> X = 1. ∴ Speed upstream = 2 km/hr Speed downstream = 3 km/hr. Speed of the stream = 1/2 (3 - 2) km/hr = 1/2 km/hr. Thus, I and II together give the answer. ∴ Correct answer is (E). |
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.
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