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From Statement I , speed of stream = x km/hr then man’s speed = km/hr From Statement II , let speed of stream = a km/hr and man’s speed = b km/hr Since times is equal to travel upstream and downstream, 2d/(a+b) = d/(b-a) We get the same statement as I, man’s speed (b) = 4 times speed of stream (a). Thus both the statements are not sufficient to answer the question.
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