A man rows a boat upstream for a certain distance at a speed of 18 km/hr. If the ratio of speed of man in still water to the speed of stream is 5 : 2, find the time taken to row a boat downstream to cover the same distance covered upstream. Statement I : The total time taken by the man to cover upstream and downstream is 25/7 hours. Statement II : The time taken to cover the distance upstream is 2.5 hours.

• A. If the data in statement I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question
• B. If the data in statement II alone is sufficient to answer the question, while the data in statement I alone is not sufficient to answer the question
• C. If the data either in statement I alone or in statement II alone is sufficient to answer the question
• D. If the data in both statements I and II together are necessary to answer the question
• E. If the data given in both statements I and II together are not sufficient to answer the question.