Question

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.

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