A question is given followed by information in three statements. You have to find out the data in which statement (s) is sufficient to answer the question and mark your answer accordingly. A man rowing a distance of d km down the stream in 4 hours. What is the value of d? I) Man covers the distance of 72 km downstream in 6 hours. II) The speed of the stream is 5 km/hr. III) Man can row the distance of 84 km in 7 hours. Correct Answer Only I is sufficient downstream speed of man (x + y) = d/4 Where x is the speed of the man in still water and y is the speed of the stream By statement I downstream speed x + y = 72/6 = 12 km/hr ⇒ d/4 = 12 ⇒ d = 4 x 12 = 48 km By statement II Speed of the stream = 5 km/hr x + 5 = d/4 From this equation we cannot find the distance covered by man. By Statement III Man can row the distance of 84 km in 7 hours. But in this statement, it is not mentioned that man is rowing in downstream or upstream. So, we cannot conclude anything from this equation. ∴ only Statement I is necessary to answer the question.