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Question

Each of the following questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and give answer.

What is the speed of a boat in still water?

I. The boat covers a distance of 120km in 5 hours while running upstream.

II. It covers the same distance in 3 hours while running downstream.

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. Correct Answer Incorrect 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. Correct Answer Incorrect Answer
C If the data either in statement I alone or statement II alone are sufficient to answer the question. Correct Answer Incorrect Answer
D If the data in both statement I and II together are not sufficient to answer the question. Correct Answer Incorrect Answer
E If the data in both statement I and II together are necessary to answer the question. Correct Answer Incorrect Answer

Solution

From I and II Let the speed of the boat be x km/hr Speed of the stream be y km/hr ∴ Speed of upstream x – y = 120/5 = 24……(i) Speed downstream x + y = 120/3 = 40 …….(ii) From eq. (i) and (ii), we get x = 32 km/hr and y = 8 km/hr

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